Step 1: The Rescue avira software is free and is available for download from:
If you have the Rescue CD then skip to Step 2. The Rescue software is based on Linux which is not subject to Windows viruses. After the download is completed you will need to run the file which will burn the ISO 'Rescue CD'. If you have dial-up, plan to spend a few hours downloading. DSL works best since the file size is over 47MB.
Step 2: Some infections can be removed by going to safe mode and running anti-virus software. At boot up press F2 or appropriate F key for your system. Then select 'Safe Mode' on the menu. When in safe mode, run your anti-virus software and delete the virus. Then shut down.
Otherwise: If your PC has a floppy drive make sure your BIOS is setup to boot first from floppy, 2nd CD , 3rd HDD0 (primary) or HDD1 (secondary). If no floppy drive, first CD, 2nd HDD0, etc. If your computer has been infected with a virus and will not boot, you need a startup floppy disk or CD in order to boot with DOS and select CD support. If you don't have a floppy drive then boot up, press 'DEL' key until you see BIOS, change setup sequence to boot first from CD. Insert the 'Rescue CD' and Save the BIOS changes. The software will auto load, then select 'English' or 'Deutsch' , then run the virus scanner.(use arrow keys and space bar). (Do NOT select 'boot from hard drive' ). Deleting the virus should resolve your problem if you have a virus similar to 'virtuemonde'. *(read below)
Now your system should boot up. If not, then you may have a more destructive virus and have corrupted system files. You have a few options. With a little knowledge of Linux you can use a Linux live CD to boot up your computer without using Windows and still access the Internet. You don't have to install Linux, just use the Live CD.
One way to prepare for future problems is to setup Linux dual boot. Having Windows already installed on your computer you can install Linux e.g.(Ubuntu,Mint, etc) as a second operating system on the same HDD. If you feel you're not capable then find someone that knows Linux. You must run a Windows scan and defrag before installing Linux. During setup you should define a Shared folder. This would give you another option to access to your critical data. If you get a computer virus, you can still access your Shared data using Linux. Linus is not affected by any Windows virus. File sharing help==> http://linuxgator.org/forums/viewtopic.php?f=15&t=879
Otherwise you may have to reinstall your operating system and suffer the loss of your data. In that case the best way to clear out your hard drive is to use 'fdisk' then format the hard drive. (see microsoft instructions: fdisk instructions ) After you 'format C:' you can install your operating system.
Of course you should always backup your important files. I recommend AVIRA virus protection software, Malwarebytes Anti-Malware and Sygate firewall.
*(virtuemonde virus: The likely result is you have been infected with a rogue anti spyware program. This spyware is also called “scareware”. The intention is to frighten the computer owner into installing and buying their deadly software. The program does not remove any spyware or viruses but in fact infects your computer further while scamming you out of money and stealing your confidential information. Whatever you do, avoid downloading any software advertised within the warning message. This is actually the easy way to tell a fake, real Windows warnings do not provide a link to download specific software.)
Other free Rescue CDs available; Kasperski, BitDefender, and F-Secure.
Deleting a file does not remove it from your computer. It only makes it invisible to your file index. When you sell or give away your computer there is personal information still on the hard drive even if you reinstall the operating system, but for the average person, that would be enough security. But keep in mind that a tech person may still be able to retrieve some of your data. For best security, run a program like 'Killdisk' which you can find at www.majorgeeks.com , but make sure you made a backup of your information and that you no longer will be using the hard drive.