It's an Windows XP and the browser could have been IE or Google. Just looked into the virus vault in more detail and I've got the dreaded Ramnit so it's probably RIP and system restore.
Once you get your computer cleaned
1. Make sure that the OS is updated with all the MSFT updates including updating to XP3 if needed.
2. Make sure that Java is updated
3. Make sure that Adobe is updated.
4. Replace Adobe Reader with Foxit.
5. Download and use CCleaner every time you close your browser including scanning for and removing DNS Cache.
6. Since you can not use IE9 on XP I suggest to greatly improve your security going forward to replace IE8 or less whatever is currently on the computer with either Chrome or Firefox.