Most likely she is running onboard audio...go to your motherboard website and download the newest audo drivers (see if they have a HD audio manager) and then
adjust your properties so that all audio line types are seperated and also disable front panel detection if you use the front panel ports for anything (the speaker or mic port in the front)...mic boost is a setting i mees with only if i can't be heard otherwise for connectiviy it is your audio drivers or windows sound setup....
Hummm...gonna have to figure this out. Only crashed twice, only after exiting BF4. No issues after exiting any other program or while in use. I also installed beta drivers...try going back to last version.
Might be driver, but it sounds hardware related. I googled "bsod bf4" and found other reports of bsod, but it seems like they were likely hardware issues also. Try the driver, but then run some hardware tests just in case.