deleting the prefetch files 
----------------------------- 
runbox command 
- press keyboard buttons: winkey + r 
- paste in the slot: prefetch 
- press: enter 
(the prefetch folder opens) 
- press: ctrl + a 
(select all is the same) 
- press: shift + del 
(deletes without prompt) 

disc clean up 
--------------- 
runbox command 
- press keyboard buttons:winkey + r 
- paste: cleanmgr.exe 
- choose drive(normally C: ) 
- press: enter 
(this process can take a long time) 

checkdisk 
------------ 
runbox command 
- press the keyboard buttons: winkey + r 
- paste in the slot: chkdsk /f /r 
- press: enter 
( black window appears) 
- press: Y button 
- press: enter 
- reboot the comp 
(this process is the longest, worse the screen may be 
lost before hours later the computer arrives at the welcome screen) 

disc defragmenter 
---------------------- 
runbox command 
- press the keyboard buttons: winkey + r 
- paste in the slot: dfrg.msc 
- press enter 
(this process can take a long time) 

deleting internet cookies, files and history 
------------------------------------------------- 
- press the keyboard buttons: winkey + r button 
- paste in the slot: inetcpl.cpl 
- press: enter 
- click: delete cookies 
- click: delete file 
- click: clear history 

disable unwanted startups 
------------------------------ 
runbox command 
- press: winkey + r 
- paste: msconfig 
- press: enter 
- click tab: start ups 
- keep: the AV and firewall entriies enabled, 
- disable: 100% unused or unneeded entries 
- Unsure about the start up: [url="http://www.bleepingcomputer.com/startups/"]http://www.bleepingcomputer.com/startups/[/url] 
(IMPORTANT: enable all startups before running the Hijackthis program)