Till now Brontok Virus has affected a lot of computer systems and will and is a problem of general people who dont know how to remove it from system.
There are two types of Brontoks mainly which are almost same in effecting the system:
1) Brontok.a
2) Brontok.q

Symptoms of Brontok Virus

1) System restarts as soon as u enter the DOS prompt.
2) Folder option is missing from Tools Menu and Control Panel
3) System often restarts when u open Internet Explorer or u get connected to Internet.
4) " Task Manager Disabled by your administrator" message comes when u try open task manager by pressing CTRL+ALT+DELETE.
5) Run command is disabled and messsage comes its disabled.
6) Registory editor is disabled.


Now these are some common symptoms I found out in many computers

Now how to cure the system and how to get rid of this.
1) If ur computer restarts and u cannot install antivirus then do one thing.
Go to My Computer properties and under ADVANCED tab in system recovery and startup uncheck the automatically restart option.
This will not restart computer when system failure occurs.
2) Now get antivirus which scans nicely. Like in my case I used kaspersky antivirus. Now u can get that from the site (trial version)
www.kaspersky.com
now install it. To make it full search some sites or Google or orkut.com
3) Now scan ur PC with that antivirus and make sure it kills virus.
Dont worry it willl show u.
4) And now u can see what to do in the site

http://www.vah.bravehost.com/system_problems.htm
Now u can see how it is removed and all the settings are changed
To bring back folder options which is not available there is here.
click here to see that how u go to it and remove it




Now u r in Run box
type gpedit.msc and now u will a see a window like this
and now u can see folder options at the right pannel
disable it and again change it to not configured and now u work is done

U will find this in Group Policy (gpedit.msc)
in
Local Computer Policy >> User Configuration >> Windows Components >>Windows Explorer
Now u will see on the right side

"Remove the folder options menu from the Tools Menu"
Now u first disable it and then change back to
Not configured