Help and Info: Safe to Delete Files

Deletable File Extension	Location	Comments
.	C:\Windows\temp	You can remove any file in this folder that is more than one day old.
*.---	C:\	Backup Files Created By Windows
*.1st	C:\	Delete these files only if you have backed up your registry
~$*.doc	Throughout your drive	Temporary Word files created whenever a document is open. Safe to delete only if the original document is closed (these 'orphans' are often left behind during a crash)
*.bak	Throughout your drive	Backup files from various applications
*.cab	Throughout your drive	Installation Files
*.chk	C:\	Files created by Scandisk and its ancestor, ChkDsk
*.dos	C:\	Safe to delete only if you don't dual-boot to DOS.
*.fts	Throughout your drive	Windows will recreate these files as needed
*.gid	Throughout your drive	Windows will recreate these files as needed
*.log	C:\ or C:\Windows	Log files created by certain programs tracking certain jobs; if they're more than a few days old, they're not being used anymore.
*.old	C:\	Old versions of files that have been replaced by newer versions
*.prv	C:\	Log files created by past Windows boots
*.shs	Desktop or Throughout your drive	Scrap objects; temporary files created in OLE-supporting applications.
*.tmp	Throughout your drive	Temporary Files from various applications.
*.wbk	C:\My Documents and its subfolders	Word Backup Files

What Can You Safely Delete?