[Main Client] Freeze and no images on login

The first time I sign into LoL each day, I seem to have this issue where it will freeze my entire computer. Afterwards, no images will show on the main client page. I can still click the links in each of the boxes, but can't see anything. If I sign out and back into LoL, this issue doesn't occur and I can see everything fine. Before anyone asks, no, I'm not running a toaster. This has been happening for the last few patches, Pre-5.