patch My PC Crashes on Open Event ID 1001 in Event Log

[clickright]

Windows 7 x64 SP1.

Steps to reproduce: double-click on patch my pc "Patch my PC has stopped working" error comes up and gone.

From event log:

Fault bucket , type 0
Event Name: CLR20r3
Response: Not available
Cab Id: 0

Problem signature:
P1: patchmypc.exe
P2: 2.3.5.0
P3: 51de4863
P4: PatchMyPC
P5: 2.3.5.0
P6: 51de4863
P7: f
P8: f0
P9: System.InvalidOperationException
P10:

Attached files:
C:\Users\XXXXX\AppData\Local\Temp\WERC10D.tmp.WERInternalMetadata.xml

These files may be available here:
C:\Users\XXXXX\AppData\Local\Microsoft\Windows\WER\ReportArchive\AppCrash_patchmypc.exe_70ed90ba759bd1a56e7c1ee937d26d74ebd75a7_0ebec58f

Analysis symbol:
Rechecking for solution: 0
Report Id: 496beb18-2aee-11e3-b8f3-d48564b56ed6
Report Status: 1

[Justin Chalfant (Patch My PC)]

Do you have Microsoft .net 3.5 installed?