so i gotta create a new thread since i can only reply once even if i have an update that deserves its own comment and not just an edit to a previous or deleted comment.
ive been having to Scan and Repair and Update essentially every day since the first SL pre-launch downloads back in early october, back when everyones game was freaking out and the UI would strobe on and off screen.
nathardrick, a tech support blizz employee reached out and told me to try to delete the indeces folder in the data file. which only works to skip the scan and repair, like slapping a band aid on a deep would that needs stiches. Nathardirck also suggested a complete uninstall and reinstall. sadly thats how i got the game to work with prepatch, so doing a 5th uninstall and re-install since SL began is absurd.
My reply to Nathardrick on my origional form “alright so i finally found the indicies folder, which while allowes me to skip the scan and repairs/updates. HOWEVER the battle.net client automatically starts trying to scan, repair, and update the already updated client on startup. this has been going on since the 1st phase of the SL content drop back in october, since the SL download as a whole was staggered over weeks. so were going on 2 months since this problem origionally started. hence my frustration with a game with a monthly subscription. while deleting the indices folder does work it is essentially an extra step to login every time. and uninstalling and re-installing is how i got it to work in the first place back in early october… and that took 4 uninstalls before it FINALLY worked.”
Repeated data corruption is typically caused by a hardware issue; in my experience, faulty drives are the most common culprits - though it’s not unheard of for an unstable overclock to have similar symptoms.
This support articles has step-by-step instructions for using Windows’ ScanDisk feature: https://us.battle.net/support/en/article/25946
I’d suggest giving that a go. If it reports that it didn’t find any issues, remove any overclocks in place on your CPU and RAM (including XMP profiles, if in use).