Windows 7 does not recognize the optical drive? Microsoft appeared to help you solve

Over time, Windows 7 bugs are starting to surface. A few days ago, after installing Windows 7, the optical drive could not be used, and the optical drive was completely normal before the installation.

Microsoft said it was aware of the problem and offered a temporary solution. Microsoft says the problem is primarily related to the firmware of some optical drives and the adaptive Link Power Management (ALPM) feature in Windows 7.

Currently, Microsoft has confirmed that the following several models of DVD optical drive in the affected column:

* Sony bc-5100s DVD

* Sony bc-5600s DVD

* Tsst ts-l633b DVD+/-RW

Microsoft said that the three models of users can contact the corresponding vendor to obtain the corresponding firmware update.

The second workaround is to disable the ALPM feature in Windows 7. This feature is primarily used to turn a hardware device into sleep after 100 milliseconds of idle time, and is part of the Corona management program in Windows7. However, disabling this feature does not affect the high performance, balanced, and power saving scenarios built into the system. Three.

Disabling this feature needs to be addressed by the command line, and Microsoft says it must enter the command in the following order:

powercfg.exe　-setacvalueindex　8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c　0012ee47-9041-4b5d-9b77-535fba8b1442　DAB60367-53FE-4fbc-825E-521D069D2456　0
powercfg.exe　-setdcvalueindex　8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c　0012ee47-9041-4b5d-9b77-535fba8b1442　DAB60367-53FE-4fbc-825E-521D069D2456　0
powercfg.exe　-setacvalueindex　381b4222-f694-41f0-9685-ff5bb260df2e　0012ee47-9041-4b5d-9b77-535fba8b1442　DAB60367-53FE-4fbc-825E-521D069D2456　0
powercfg.exe　-setdcvalueindex　381b4222-f694-41f0-9685-ff5bb260df2e　0012ee47-9041-4b5d-9b77-535fba8b1442　DAB60367-53FE-4fbc-825E-521D069D2456　0
powercfg.exe　-setacvalueindex　a1841308-3541-4fab-bc81-f71556f20b4a　0012ee47-9041-4b5d-9b77-535fba8b1442　DAB60367-53FE-4fbc-825E-521D069D2456　0
powercfg.exe　-setdcvalueindex　a1841308-3541-4fab-bc81-f71556f20b4a　0012ee47-9041-4b5d-9b77-535fba8b1442　DAB60367-53FE-4fbc-825E-521D069D2456　0