If you experience further problems, please include you proper PC specs in the question.
Including HDD type, amount of RAM, OS type (64/32 bits) etc. It's practical to put them in your signature.
There are many things that can lead to drop outs. If your PC just hardly exceeds the minimum requirements, it doesn't mean the road is open to everything.
Recording 8 tracks simultaneously at 96 kHz, for example, sets requirements to HDD speed and so on.