I currently have 11 svchost processes listed. Seeing that multiplied is normal for the most part unless a virus renames itself as that.
Once you got back online prior to seeing all protections installed like antivirus, antispyware, etc. you could have got hit with something trying gum up the works with a hidden process. But wiping the drive entirely while being a hassle for most would insure any bugs were gone whether a trojan snuck in or a Windows glitch between the remnants of the previous install tied in with the current one.
One thing to know first is which partition in Windows on presently first or second? It sounds like you installed it to a second where the first could be removed once all files are copied from that. But moving the current OS primary to the front of the drive takes as long as creating a new primary after dumping the first, reinstalling Windows plus! and I mean plus all drivers along with most of the programs you run.
A quick wipe and a new primary with the files backed up elsewhere goes much faster while still being a large pain until you finally have everything back on again. The second install was rushed by you leaving that a little awkward where this would be the idea. On a normal install the isolation and solution for the problem would be looked into rather then this however.
