TEMP & TMP Values - Batch or Reg File to Change ?

I use a RAM disk for temporary files but when I have a large Windows update I need to change the Environment Variables' temp locations to a different disk. I do this manually each time for the four items (User: TEMP and TMP, System: TEMP and TMP). Does anyone have a batch or reg file that will do these changes? Also, do I need to change both the User and System locations when I do this, or just the User locations? Or, if you could tell me which registry items to modify I could probably create the file. Thanks for any info.

Could you not search the registry for the present values so you know where they are stored and modify to suit?

I used this before 11 started to give temp errors, but I think you need to restart 11, restarting explorer might not be enough.

TairikuOkami said:

I used this before 11 started to give temp errors, but I think you need to restart 11, restarting explorer might not be enough.

Click to expand...

Yes, you need to restart the system as those are ENV variables that need to get initialized very early on.

There is no need to use the reg command for this purpose (even though you always could).

For the current user:

System-wide:

Some applications may not pick up the new values until they are restarted or until you log off and then log on again.

Thank you for your replies.

To hdmi: I put your codes (with the folder locations changed) into a bat file and ran it as administrator, then restarted my PC. The locations did not change in the Environment Variables box.

To TairikuOkami: Why does one line have REG_EXPAND_SZ and the other REG_SZ?

In my registry search for environment variables, I found five instances, each having both the TEMP and TMP names:
[HKEY_CURRENT_USER\Environment]
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Session Manager\Environment]
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Environment]
[HKEY_USERS\S-1-5-21-1705685031-1339510746-3272408279-1001\Environment]

I use a 10GB RAM disk (Y) for general usage, but a large Windows update requires more space, which is why I change the locations. I have been changing all four values (user and system, temp and tmp) using the Environment Variables box. When doing this, do I need to change both the user and system temp file locations?

Windows update won't be using your profile, so there's no point in changing the user variables. The default for the system of C:\Windows\temp is traditional but not necessarily a good idea. That folder is user writeable, but not easily readable. There's probably merit in the suggestion in The 10 Commandments for Windows™ 10 (plus an 11th for Windows™ 11) (towards the end of #2) "Separate the system’s user-writable (shared) "TEMP" directory". I think that there are probably some applications hard coded to use C:\Windows\temp, which may be why it's not been fixed.

So don't change the user variable, and leave the system one pointing at a regular drive.