Can't copy and replace existing file

[rdwray]

I cannot copy a file and replace an exiting file:

No messages, not even "file exists"; this includes drags and copy/paste.
Get "file exists" on "Save As.
On "Cut" "Error 0x80070490: Element not found"

I have to physically delete the file and paste the new one. This is not a protection problem, it is just a simple text file that I created for the test in 2 different folders. This is the first time I have ever seen this including Win 3.1. Thanks....

Win 7 - 64 bit, Home Prem.

 

[brady]

This can be a ton of things... let's start with the basics.

Antivirus?
IE toolbars installed/enabled?

 

[rdwray]

AntiVirus: Microsoft Security.
No IE Toolbars, using Firefox.
Firewall: Comodo.
Made some changes to .msstyles. Do not remember when this could have started, but it is very recent.

 

[rdwray]

OK, I changed the .msstyles file to the original and the problem went away; so what could .msstyles affect that would cause this problem?????? Thanks again...