Keep your PC at peak performance! | WiseCleaner-Advanced PC Tune-Up Utilities
File Extensions of Wise PC Engineer
Extension Description Safe to delete
.tmp Temporary file created by programs Yes
temp Temporary file created by programs. Yes
.diz File created when download is run. yes
.chk Scandisk recovered file. yes
.old Outdated file. yes
.gid File created when a help file is run. yes
.nch Newsgroup's cache file. yes
.wbk MS Word's Backup file. yes
.fts Created by searching within a help file. yes
.ftg Windows helpsystem temp file. yes
.$$$ Temporary file created by programs. yes
*log.txt Log file, create by programs. For more space
.err Create by program when some error happened yes
.--- Temporary file created by programs. yes
~* Temporary file created by programs. yes
~*.* Temporary file created by programs. yes
.??$ Temporary file created by programs. yes
.___ Temporary file created by programs. yes
.log Log file, create by programs. For more space
.~mp Temporary file created by programs Yes
_mp Temporary file created by programs. Yes
.dmp Win2000/XP memory dump file. Yes
.prv Outdated file. Yes
.sik backup file. For more space
.bak backup file. For more space
thumbs.db index file created by system in order to improve the picture Yes
  browsing speed.  
.ilk Intermediate file For More Space
.aps Intermediate file For More Space
.ncb Intermediate file For More Space
.pch Intermediate file For More Space
.$db Temporary file created by programs. Yes
.?$? Temporary file created by programs. Yes
.db$ Temporary file created by programs. Yes
.?~? Temporary file created by programs Yes
.??~ Temporary file created by programs. Yes
.^ Temporary file created by programs. For More Space
._dd Temporary file created by programs. For More Space
._detmp Temporary file created by programs. For More Space
mscreate.dir Temporary file created during setup. Yes
chklist.* Temporary file created during setup. Yes
.bk? Potential junk file. For More Space
.$a Temporary file created by AutoCAD. Yes
.xlk MS Excel's backup file. Yes
.cdr Backup file created by Corel Draw. Yes
pspbrwse.jbf Paint shop folder image information cache file. Yes
.nav Backup file created by programs. For More Space
.ms MS product backup file. Yes
_desktop.ini May be create by virus. Yes

Below these extensions may also belong to junk files: (But, we can not be sure)

*.bmk *.cam *.cb *.cln *.cnt *.da1 *.da2 *.diz *.fix *.ign *.ink *.lgc *.lge *.lic *.new *.out * .par *.pvt *.query *.syd *.umb *.~mp *.!!! *.lhx

PS: If you know more extension of junk files, please tell us, thank you!