I tried to follow the instructions in the post below because I have a very similar problem. Randomly, my computer would fail to start and automatically begin a repair which takes about 30 minutes to complete. Sometimes the repair fails and then automatically shuts down. Afterwards, my computer would start like normal with no issues. I downloaded OTL and scanned my computer with the 60 days setting. The notepad files from the scan are attached.
Is there anything else I need to do? I ran the scan, but have no idea what to do with the notepad documents that I received from the "Run Scan" process. Is there anything I need to modify before I copy and paste the txt from the notepad docs into the "Custom Scans/Fixes" box so that I can perform a "Run Fix" with OTL?