how did you install and Deleted all the Drives?
Did you boot from cd (change boot order in bios) and format at the setup?
What windows do U have and what do U want to install?
Do you have more then one hard drive? Do U have two partitions on one hard drive?
what you may have done:
- tried from inside Windows
- booted from cd, just installed over your current system and got messed up with the older one,
- booted from cd, installed on another partition or hard drive and by default it starts the old one.
-and by old windows, u mean just the Windows (clean) or U still have your files, programs on the partition that should have been deleted?
Check you hard drive(s) if there is an actual installation, somewhere else then the usual.
Like I said, the fact that the old windows show up, makes me think it didn't actually format anything and/or just installed on top of the old windows, or installed to a different partition. U can again try a clean install, or if it installed on a different partition, u can check by searching if there is another Windows folder, besides the C:\Windows.
I did had some formating trouble way back, and I started using recovery console to format and partition in dos.
But it's a bit harder, so first U should try the tutorial, then, if we are sure it's not working, write back and I'll guide you.