guys..help me..a stuppid virus is infected in ma system:ashamed:..accidently i clickd on a notepad file from a pendrive..then my system got stuck..wen i played GTA..'n i restarted my system..bcoz my system task manager ws not workin.. 
now i cant install any antivirus..i tried to install avira..but wen i click on the setup file..nuthn happens..i installed NOD32..but i cannot scan or sumthn..coz it says “Failed To Run a Scan”..when i press ctrl+alt+del .. it says..“Task Manager Has Been disabled by your administrator”..it also happens when i tried to open registry edit!!i cannot run any applications..like media player classic..3DS Max..etc etc..guys..help me..i don have any antivirus in ma system now..only NOD..but not workin..wat shud i do??:huh: 
This problem is most commonly caused by a virus called “Brontok“. Brontok virus will make some changes to the system restrictions in order to hide itself from easy detection and also from easy cleaning.
Have a look at this - Technology - Gadget Advisor
download the Remove Restrictions Tool , run it in safe mode and then also do a complete scan in safe mode using an updated anti-virus.
Hope this helps .
i cant login in safe mode..i hit F8 juz b4 loading screen..'n select safe mode..my system restarts..i cant do anything..:huh:
go to msconfig and select diagnostic startup, restart and see if u can open regedit then
well if you cannot go into windows , then take a day off and format and install your stuff again 
Download and run ComboFix. Tutorial and link could be found here : A guide and tutorial on using ComboFix
Sureshot solution for issues like these.
kippu!! i reinstalled XP..but nooooooo waayy!!it ws okey for d first time..wen i restarted it..again gone!!taskmanager gone..:huh: 
can i remove that virus by deleteing manually??:huh:
try using the task manager dsabled fix from here… (scroll down to method 5)
PC Hell: Task Manager Has Been Disabled By Your Administrator - Fix
try Norton in safe mode
try this.. maybe it can re-enable all your disabled options..
Is gpedit.msc available on RUN command?
If not download Hiren’s Boot CD - Google it. Try torrent downloads.
Also, try out Dr.Web CureIt! - that’s an effective solution. I had the same issue last month, and Dr.Web CureIt helped me..