Symptoms this will fix
- My mapped drive won't work no matter what
- My Citrix drive maps have a red X on them
- It asks for my login name and password even though I know it’s right
- It asks for my login name and password and doesn't normally

Do not click the X on Citrix to get out, logoff of Citrix. 

You must be an administrator on your local computer to perform this next step 
Run the lmcompatibilitylevelfix.reg file on the local computer having the problem 

Reboot the local computer Login to Citrix - you should not have any programs already running - if you do, logoff and then log back in. 

It should be fixed.