Windows explorer is really ticking me off

Today I did a full back up of my system.TO my knowledge it was working just
fine before the backup. afterwards however I had a missing .dll and windows
explorer freezes if I attempt to search either of my hard drives(I type one
charachter). so I open task manager, check it out can't find a damn thing so
I end the task and get this:

Description:
A problem caused this program to stop interacting with Windows.

Problem signature:
Problem Event Name: AppHangXProcB1
Application Name: Explorer.EXE
Application Version: 6.0.6001.18000
Application Timestamp: 47918e5d
Hang Signature: 3b3c
Hang Type: 88136
Waiting on Application
Name: iexplore.exe:{0002df01-0000-0000-c000-000000000046}
Waiting on Application Version: 7.0.6001.18000
OS Version: 6.0.6001.2.1.0.768.3
Locale ID: 1033
Additional Hang Signature 1: f86069f733a2dbfa9b86310ed3063b7d
Additional Hang Signature 2: 5fce
Additional Hang Signature 3: f2db14b6d894a23bf3914a2ad958a3ef
Additional Hang Signature 4: afc9
Additional Hang Signature 5: 7294ace9eadbed58a618dd2f07cc0acc
Additional Hang Signature 6: afba
Additional Hang Signature 7: 985cf3b8130c60c2cdc7dc82707ad6af

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What does this mean and how do I fix it??