Liu Ce, first things first: Do not despair. Do not panic. Being panic or despair will exacerbate things since it's more likely you do more mistakes.
Backing up your data is good enough. You may want to back up your Outlook mailbox file. It's in:
C:\Documents and Settings\Baeten\Local Settings\Application Data\Microsoft\Outlook
Just backup all files over there (esp Outlook.pst) so that you won't discard any mails. As far as for other data, you don't need to I suppose. Sony's install CDs would provide such fresh installation.
Follow Lady Wu's instructions. Note that since the spywares are quite a lot, it may be hard to remove them -- especially when there's a strong possibility of virus(es) interfering the process. I've been dealing with campus computers before and cleaning spywares drove me nuts. Not only that they're annoying, they keep reinstalling and even some have the capability to block and crash your Windows.
I would have to stress this though: It's better to run both AdAware and Spybot in Safe mode. To go to safe mode, reboot your computer and start pressing F8 like crazy. Choose "Safe mode". Details here:
http://support.microsoft.com/default.as ... -US;315222
This is because in Safe mode: most viruses and spywares won't execute (except for the nastiest strains). It makes cleaning much easier. Once you run both AdAware and Spybot to clean it up, reboot and return to safe mode again. Rerun both programs once more to make sure that there are no more spywares.
* If they're keep coming back even in Safe Mode, then you'd better reformat your hard drive.
* If it's clean, reboot to normal mode. Recheck using Hijackthis. If the spyware(s) are still coming back, reformat your hard drive. If they're clean, proceed to antivirus installation.
* I would suggest Norton Antivirus and not PC-Cilin. Note: Unlike anti-spyware program that may coexist peacefully, DO NOT install more than one anti-virus programs. If you decide to install NAV, uninstall PC-Cilin first, then install NAV. After installing the anti-virus, don't forget to update the virus-definition first! Otherwise it won't be able to detect new viruses. Run the scanning program on all hard drives you have (i.e. thorough scanning). This may take some good hours. Have a snack and relax.
* Follow everything the NAV says. Whenever it detects viruses, always favor to delete files rather than quarantine or cleaning it. After you're done with the thorough scanning. Reboot to normal mode and do thorough scanning once more. If the virus keep coming back, reformat your hard drive (because viruses sometime outsmart the anti-virus programs). If the virus is gone, congratulations.....
Hope this helps,