Some Notes on the Machines

Something new. Reported to help a lot, especially with Internet connections higher than 10Mbps.

Basically, we browse here in the registry:

Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters

we create (or edit) DWORD IRPStackSize, and we set it to 32. Default is 15, and Microsoft reportedly says that values 33-38 are fraught with peril.

There are a lot of cartoon-ish smileys now in character sets, but I like the originals, they are gentler and don’t intrude so much. They were transferred to Unicode quite a while ago, and here they are:

Many fonts have them in uneven sizes. “DejaVu Sans”, among many others, do them very well.

Something relatively new. Very interesting changes from some Microsoft documentation, searchable here. Performance improvements have been visible in general behavior of all machines tested for this so far. On some, reported CPU speed does still change over time. BIOS changes are likely to assist as well.

The lines below work in administrative Powershell. It creates a new power scheme called “Maximum Performance”, based on the hidden built-in “Ultimate Performance” if it exists on your system. To revert, just go into Power in the Control Panel and reselect your original power scheme.

powercfg -duplicatescheme e9a42b02-d5df-448d-aa00-03f14749eb61

$oldpower = powercfg -getactivescheme
"Creating power scheme:  Maximum Performance"

$newpower = powercfg -duplicatescheme scheme_current
$newpower = ($newpower[19..54] -join "")
powercfg -changename $newpower "Maximum Performance"
powercfg -setactive $newpower

# Makes maximum CPU speeds available, by default they're not
powercfg -setacvalueindex scheme_current sub_processor PERFBOOSTMODE 2
powercfg -setacvalueindex scheme_current sub_processor PERFBOOSTMODE1 2
powercfg -setacvalueindex scheme_current sub_processor PERFINCTHRESHOLD 0
powercfg -setacvalueindex scheme_current sub_processor PERFINCTHRESHOLD1 0
powercfg -setacvalueindex scheme_current sub_processor PERFINCTIME 0
powercfg -setacvalueindex scheme_current sub_processor PERFINCTIME1 0
powercfg -setacvalueindex scheme_current sub_processor PERFDECTHRESHOLD 100
powercfg -setacvalueindex scheme_current sub_processor PERFDECTHRESHOLD1 100
powercfg -setacvalueindex scheme_current sub_processor LATENCYHINTPERF 0
powercfg -setacvalueindex scheme_current sub_processor LATENCYHINTPERF1 0
powercfg -setacvalueindex scheme_current sub_processor PERFAUTONOMOUS 0
powercfg -setacvalueindex scheme_current sub_processor PERFDUTYCYCLING 0

# Sets overall throttles to maximum
powercfg -setacvalueindex scheme_current sub_processor PROCTHROTTLEMAX 100
powercfg -setacvalueindex scheme_current sub_processor PROCTHROTTLEMAX1 100
powercfg -setacvalueindex scheme_current sub_processor PROCTHROTTLEMIN 100
powercfg -setacvalueindex scheme_current sub_processor PROCTHROTTLEMIN1 100
powercfg -setacvalueindex scheme_current sub_processor HETEROCLASS1INITIALPERF 100
powercfg -setacvalueindex scheme_current sub_processor HETEROCLASS0FLOORPERF 100

# Turns off CPU core controls, tells OS to just use them all.
powercfg -setacvalueindex scheme_current sub_processor CPMAXCORES 100
powercfg -setacvalueindex scheme_current sub_processor CPMINCORES 100
powercfg -setacvalueindex scheme_current sub_processor DISTRIBUTEUTIL 0
powercfg -setacvalueindex scheme_current sub_processor CPDISTRIBUTION 0

# Minimizes CPU spinup time, and maximizes spindown time, just in case
powercfg -setacvalueindex scheme_current sub_processor CPINCREASETIME 0
powercfg -setacvalueindex scheme_current sub_processor CPDECREASETIME 100
powercfg -setacvalueindex scheme_current sub_processor CPHEADROOM 0
powercfg -setacvalueindex scheme_current sub_processor CPCONCURRENCY 0
powercfg -setacvalueindex scheme_current sub_processor LATENCYHINTUNPARK 0
powercfg -setacvalueindex scheme_current sub_processor LATENCYHINTUNPARK1 0

# Sets energy savings preference to zero
powercfg -setacvalueindex scheme_current sub_processor PERFEPP 0

# Commits all above changes to current power plan
powercfg -setactive scheme_current

Some detail can be had here and here.

These changes are disrecommended for cooling-poor laptops. And one might want to watch the temperatures of poorly built desktops and even some poorly built servers, too.

A version of the above which alters the original power scheme, and runs in administrative CMD, is below. The below is not very easily reversible. It does not use the “Ultimate Performance” builtin.

REM Makes maximum CPU speeds available, by default they're not
powercfg -setacvalueindex scheme_current sub_processor PERFBOOSTMODE 2
powercfg -setacvalueindex scheme_current sub_processor PERFBOOSTMODE1 2
powercfg -setacvalueindex scheme_current sub_processor PERFINCTHRESHOLD 0
powercfg -setacvalueindex scheme_current sub_processor PERFINCTHRESHOLD1 0
powercfg -setacvalueindex scheme_current sub_processor PERFINCTIME 0
powercfg -setacvalueindex scheme_current sub_processor PERFINCTIME1 0
powercfg -setacvalueindex scheme_current sub_processor PERFDECTHRESHOLD 100
powercfg -setacvalueindex scheme_current sub_processor PERFDECTHRESHOLD1 100
powercfg -setacvalueindex scheme_current sub_processor LATENCYHINTPERF 0
powercfg -setacvalueindex scheme_current sub_processor LATENCYHINTPERF1 0
powercfg -setacvalueindex scheme_current sub_processor PERFAUTONOMOUS 0
powercfg -setacvalueindex scheme_current sub_processor PERFDUTYCYCLING 0

REM Sets overall throttles to maximum
powercfg -setacvalueindex scheme_current sub_processor PROCTHROTTLEMAX 100
powercfg -setacvalueindex scheme_current sub_processor PROCTHROTTLEMAX1 100
powercfg -setacvalueindex scheme_current sub_processor PROCTHROTTLEMIN 100
powercfg -setacvalueindex scheme_current sub_processor PROCTHROTTLEMIN1 100
powercfg -setacvalueindex scheme_current sub_processor HETEROCLASS1INITIALPERF 100
powercfg -setacvalueindex scheme_current sub_processor HETEROCLASS0FLOORPERF 100

REM Turns off CPU core controls, tells OS to just use them all.
powercfg -setacvalueindex scheme_current sub_processor CPMAXCORES 100
powercfg -setacvalueindex scheme_current sub_processor CPMINCORES 100
powercfg -setacvalueindex scheme_current sub_processor DISTRIBUTEUTIL 0
powercfg -setacvalueindex scheme_current sub_processor CPDISTRIBUTION 0

REM Minimizes CPU spinup time, and maximizes spindown time, just in case
powercfg -setacvalueindex scheme_current sub_processor CPINCREASETIME 0
powercfg -setacvalueindex scheme_current sub_processor CPDECREASETIME 100
powercfg -setacvalueindex scheme_current sub_processor CPHEADROOM 0
powercfg -setacvalueindex scheme_current sub_processor CPCONCURRENCY 0
powercfg -setacvalueindex scheme_current sub_processor LATENCYHINTUNPARK 0
powercfg -setacvalueindex scheme_current sub_processor LATENCYHINTUNPARK1 0

REM Sets energy savings preference to zero
powercfg -setacvalueindex scheme_current sub_processor PERFEPP 0

REM Commits all above changes to current power plan
powercfg -setactive scheme_current

If group policy cache is clear, group policy bugs are ironed out, and you still see bad/nonfunctional printers forcibly recreated and/or print-over-RDP doesn’t work, try this (you’ll need psexec) in administrative CMD:

psexec.exe -s reg delete "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Print\Providers\Client Side Rendering Print Provider" /f
psexec.exe -s reg delete "HKLM\SYSTEM\CurrentControlSet\Enum\SWD\PRINTENUM" /f
psexec.exe -s reg add "HKLM\SYSTEM\CurrentControlSet\Enum\SWD\PRINTENUM"
psexec.exe -s reg delete "HKLM\SYSTEM\CurrentControlSet\Control\DeviceClasses\{0ecef634-6ef0-472a-8085-5ad023ecbccd}" /f
psexec.exe -s reg add "HKLM\SYSTEM\CurrentControlSet\Control\DeviceClasses\{0ecef634-6ef0-472a-8085-5ad023ecbccd}"

Any SMB-mapped printers will be deleted or grayed, IP direct printers will remain.

If you see GPO policies get implemented and re-implemented even though the settings have been removed, or if it just doesn’t happen, try the following in administrative Powershell. These clear the GPO cache on the machine you’re looking at.

Remove-Item "$env:windir\system32\GroupPolicy" -Force -Recurse
Remove-Item "HKLM:\Software\Policies\Microsoft" -Force -Recurse
Remove-Item "HKCU:\Software\Policies\Microsoft" -Force -Recurse
Remove-Item "HKCU:\Software\Microsoft\Windows\CurrentVersion\Group Policy Objects" -Force -Recurse
Remove-Item "HKCU:\\Software\Microsoft\Windows\CurrentVersion\Policies" -Force -Recurse

The scenario: a user has a corrupt Windows profile. We don’t want to delete the profile because it may have valuable data. We need to give the user a new one.

1. Log into the PC as a different user, an administrator.
2. Run regedit. Paste the following in the registry location bar near the top: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList
3. And hit Enter. Then Find (Edit/Find, or Ctrl-F) the username of the user you are working on.
4. In the left pane, rename the container to .OLD
5. Rename the user’s folder in C:\Users to .OLD as well.
6. Log off, and log on as the user.

There is a built-in, hidden, “Ultimate Performance” power scheme in Windows 10, 11, and probably others:

powercfg -duplicatescheme e9a42b02-d5df-448d-aa00-03f14749eb61

Does not include everything in a page on this site, but integration will follow soon :-)

Gleaned the following list via a web search recently. There is probably an item or two not entirely relevant:

*.intuit.com
*.intuit.net
*.lscsoft.com
*.lnet1.com
*.quickbase.com
*.intuitcdn.net
*.lacertesoftware.com

Here’s something interesting:

https://docs.microsoft.com/en-us/java/openjdk/download

Sometimes the ‘shutdown’ command fails. One way to get a reboot to happen:

echo s > /proc/sysrq-trigger
echo u > /proc/sysrq-trigger
echo b > /proc/sysrq-trigger