Search for and delete all files with "*.tmp"
Search for all files "temp" Delete the contents of them, do NOT delete the folder.
Go to Control Panel
Click Internet Options
Click "Delete Cookies", click OK, may take a few minutes
Click "Delete Files"
Check "Delete all offline content" click OK, may take a few minutes
Click "Clear History" click Yes, may also take a few minutes
Perform Disk Cleanup checking all boxes except "Compress old files"
Start/All Programs/Accessories/System Tools/Disk Clean-up
or
Disable the Low Disk Space warning:
1. Copy below and paste into Notepad.
----------copy inside only----------
Windows Registry Editor Version 5.00
----------copy inside only----------
2. Save-as LowDiskSpaceOff.reg (or any name + .reg)
3. Double-click or right-click and merge into the registry.
and
How to Understand Low Disk Space Warning