Random crashes

My client is randomly crashing in the main menu. I was taking my time before loading into a game, so it has not crashed me out of champion select, but I do not want to try if I will just crash out. First time logging in, it crashed immediately. Second time it lasted a few seconds. Ran the repair tool. 3rd time I was logged in for a minute or two, i was just looking at the "play" screen, had not selected a game mode yet, and it crashed again with this error: "Problem signature: Problem Event Name: APPCRASH Application Name: LolClient.exe Application Version: 0.0.0.0 Application Timestamp: 515663e0 Fault Module Name: combase.dll Fault Module Version: 6.3.9600.17031 Fault Module Timestamp: 53086d7c Exception Code: c0000005 Exception Offset: 000be143 OS Version: 6.3.9600.2.0.0.256.48 Locale ID: 1033 Additional Information 1: 1e5d Additional Information 2: 1e5d0d2c6fec87d873489f072c940d92 Additional Information 3: 483c Additional Information 4: 483c5c90d4d13a8407a2e11843e79716"

copied from: http://boards.na.leagueoflegends.com/en/c/help-support/vpHMKyf9-random-crashes as I didn't know where to post this