Presario CQ 71 - Built in Webcam not detected under Windows 7 Professional - No HP-101 device

I have a Compaq Presario CQ 71 EB400. On this notebook I run both Windows 7 Home Premium 64-bits and Windows 7 Professional 64-bits to compare behaviour of apps and windows features in both environments.
Windows 7 Home on my HD C partition
Windows 7 Professional on my HD F partition.
The CQ 71 has a built in Webcam, that shows up under Windows 7 Home premium Device Manager - Imaging Devices (Cameras and Scanners) as HP-101, linked to the required drivers.
Under Windows 7 Home premium:
- The built-in CQ 71 Webcam is detected and operational - the HP-101 entry is present in Device Manager.
- Applications using a Webcam like Skype, Mycam, Manycom etc connect with the Webcam
- When I plug in an external Webcam, thet webcam is detected as well, drivers loaded etc.
Under Windows 7 Professional:
- The built in Webcam is not detected, in the Device Manager -Imaging Devices, the HP-101 Webcam entry is absent
- Skype, Mycam, Manycam cannot find a Webcam (also not when an external USB Webcam is plugged in)
- A plugged in external Web cam is not detected as an imaging device.
I use a Brother printer/scanner/fax machine, the Brother scanner device is visible as Imaging device in Device manager in both Windows 7 Home premium and Windows 7 Professional.
Other USB devices, portable disks, card readers etc seem to work OK in both Windows 7 environments.
The HP support pages provide information what to do when a internal Webcam is not detected; The recommended actions make no difference. Going back to a previous W7 Prof restore point is no option, as on the CQ 71 notebook the built-in Webcam never functioned under W7 Professional.
The major difference is that all Windows 7 Home Premium relatede system software resides on the C partition, all Windows 7 Professional system software on the F partition.
I'm looking for a way to kickstart the built in CQ 71 Webcam under Windows 7 Professional installed on a non-standard partition.
Your suggestions will be very welcome.
Jan Dijckmeester.

Hi again jdij,
It is good to hear back from you!
To enable your system to detect the Webcam in Windows 7, I recommend re-installing the original drivers and software that first came with your computer. This can be done by following the steps in this document on Using Recovery Manager to Restore Software and Drivers (Windows 7). To update the newly installed software, please follow this resource on Using HP Support Assistant (Windows 7).
If the webcam is still not detected, I recommend returning your system back to a previous restore point. This can be done by following the steps in this document on Using Microsoft System Restore (Windows 7).
Should the problem continue, I suggest performing a backup and recovery of your operating system. This can be done by following the steps in this resource on Backing Up Your Files (Windows 7), as well as Performing an HP system recovery (Windows 7). This should return your system back to factory defaults.
If the issue persists, please call our technical support at 800-474-6836. If you live outside the US/Canada Region, please click the link below to get the support number for your region.
http://www8.hp.com/us/en/contact-hp/ww-phone-assist.html
I hope this helps!
Regards
MechPilot
I work on behalf of HP
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Presario CQ 71 - Built in Webcam not detected under Windows 7 Profession​al - No HP-101 device

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