Steam problems with programs

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So, recently, I decided to try and reinstall steam. To save my games by moving my steamapps folder onto my desktop. After I realized how long that would take, I decided to hit cancel on the transfer. In the short moment I did that, it looked like the cancel crashed rather than canceling the transfer (short white fade out like a not responding screen). I checked the file and it gave me a message that said something along the lines of "this file is not here now, it's somewhere else". I found the steam apps folder on my desktop (and it seems to be 405 gigs), so I think I might be able to replace my current steamapps folder instead of re-downloading all my games. Every time I move it, it says it's opened in another program(I did exit out of steam completely). Also, when I hit properties on it, the listed disk space has to count up to get to the 405 gig display. It just starts at 1 gig and starts counting up. Also my hdd says that I have about 100 gigs left, but ever since the little incident its display shows an almost full blue bar, but still says I have 100 gigs. The number shows what I would have if the steamapps on my desktop took up space, and the bar shows how much I would have if it didn't exist. I don't know if the steam apps folder is corrupt or something. I might be able to drag each game folder to my new steamapps folder from my old one, but I don't want to try that unless I know what will happen. As a side note, I went to check my programs and I uninstalled all of the games I lost because they had lost their icons (Looks like this). This was before I encountered the folder on my desktop as well.

[Himommies]

go in task manager  and kill anything that has steam or valve on it

[Earn]

29 minutes ago, Himommies said:

go in task manager  and kill anything that has steam or valve on it

I already have done that