Hello,
recently, we've been reported by some users about S2 locking problem of the TBS5925 and TBS6925, this is caused by the OEM version of DVBDream, now new Windows driver is available to fix it, please try:
for TBS5925: http://www.tbsdtv.com/download/document/tbs5925/tbs5925-windows-driver_v1.0.1.9.zip
for TBS6925: http://www.tbsdtv.com/download/document/tbs6925/tbs6925-windows-driver_v1.0.1.20.zip
if you find similar problem with some other software, please contact us, thank you.