DVD Not working in Windows 7

Hi, I'm having issue with Windows 7 DVD, all CDs are working fine but when I insert DVD it doesn't work, Actually, I had this same problem on 2 machines, previously I though it could be a hardware issue, but now I feel that its some kind of driver issue, or issue with Windows 7 updates.
I searched on internet for fix, and found Regedit fix, of upper filter n lower filter delete, but when I checked there aren't those filters in my Laptop.(I checked it The CD drive or the DVD drive does not work as expected on a computer that you upgraded to Windows Vista here) Well, is there any fix, or it is some kind of virus attack? How to fix it , anyone can help?

Is it an original shiny microsoft disk? Can you run the disk, or it doesn't show up at all? Do you see the drive, is it shown as empty?

Thanks Speedgamer01 for such a quick reply, well, I see the Drive, but doesn't play DVDs only CDs are working. I tried different DVDs which aren't working on my PC, but working on other computers.

Do you have daemon tools or any such software?

Speedgamer01, I've no knowledge about Daemon Tools, but these softwares applications are installed in my Laptop
uTorrent
Adobe Air
Adobe Community Help
Adobe Dreamweaver CS5
Adobe Flash Player 10 Active X
Adobe Flash Player 10 Plugin
Adobe Media Player
Adobe Photoshop CS5
Adobe Reader X (10.1.0)
Atheros Driver Installation Program
Avast! Free Antivirus
Broadcom 802.11 Wireless Lan Adapter
Cisco EAP-FAST Module
Cisco LEAP Module
Cisco PEAP Module
Conduit Engine
Drop Box
Email Address Extractor
ENE CIR Receiver Driver
FileZilla Client 3.5.0
Google Chrome
Google Talk (remove Only)
HP MediaSmartSmartMenu
IDT Audio
Intel Graphics Media Accelerator Driver
Link Directory Submitter V2.0
LiveZilla
MaxBulk Mailer 6.6.0
Microsoft .NET Framework 4 Client Profile
Microsoft .NET Framework 4 Extended
Microsoft Office Enterprise 2007
Microsoft Visual C++ 2005 Redistributable
Microsoft Visual C++ 2005 Redistributable (x64)
Microsoft Visual C++ 2008 Redistributable - x86.9.0.30729.4148
Mozilla Firefox 5.0 (x86 en-US)
Mozilla Thunderbird (3.1.11)
oDesk Team
Paltalk Messenger
Realtek Ethernet Controller Driver For Windows Vista and Later
Realtek USB2.0&PCIE Card Reader
SENuke
Skype Toolbars
Skype 4.2
Snagit 10
Snooker147 & Poolster
Team Viewer 6
Ultimate Submitter Kit4 Pro
uTorrentBar Toolbar
VLC media Player 1.1.9
Windows Media Player Firefox Plugin
WinRAR 4.00 (64-bit)
XAMPP 1.7.4
Yahoo Messenger
ZTE CM

And Anthony... I'm using HP Pavilion DV4, Laptop,
its System Detail and Device Manger Images are attached with my reply...

I hope these thing will help better to solve the issue..