I did a search on this forum and found some old threads with stories about Chkdsk wiping out all data from hard drives, so I want to make sure I don't mess things up. I've been getting pop-ups asking me to run Chkdsk Utliity due to corrupt files for quite some time. I've noticed that it now takes a really long time for my PC to startup and runs rather slow in general. I've run Avira, MalawareBytes, SuperAntiSpyware, and HiJackThis and the guys over on the Vrius/Malware forum say I'm clean. So I think maybe I should look at running Chkdsk. Can anyone guide me through this process or advise if there are any other tests I can do? I want to get my Windows OS running back to normal. OS Name: Microsoft Windows XP Professional Version: 5.1.2600 Service Pack 3 Build 2600 Thanks!