Issue Description：
Terminal Server can't connect from clients.
Our Server found a virus named W32.SillyFDC. We used Symantec kill it.
Then we found all .msc file can't be open.
Check:
As you known, .msc is linked to .dll, .exe and so on. And we run .exe file and it's OK. But .dll must use .msc to open.
So we think its problem is on .msc.
In safe mode, check and scan system driver, no found
Solution:
1, Check regedit information. Can't be solved
2, regsvr32 C:\Windows\system32\msxml3.dll (.msc need it to explan). Can't be solved
3, Copy a .msc from another server to TS and it still can't run. Can't be solved
4, Try to register some .dll file referred .msc. Can't be solved
5, mmc.exe %windir%\system32\eventvwr.msc. EventViewer can run.
It's meanings the issue is referred open with(open way). It need mmc.exe to open the .msc program.
OK, when you move your mouse on a link such as Admin Tools->IIS Right click, select open with->always use selected program and browse-> find C:\windows\system32\mmc.exe file. Selected it and OK.
Then you'll find all .msc can be open.
