Vista Class Not Registered Errors

radxxryan

New Member
Hello,

Over the last few weeks, my Windows Vista laptop has occaisonally been very slow when doing things such as browsing with IE, taking a good 1-2 minutes to bring up my computer or other explorer windows, and taking longer than usual to shut down or restart. I checked for viruses and didn't come up with any.

I am running:

Windows Vista Home Premium
Service Pack 2
220GB HDD
3.00 GB of RAM

I did some research online, and several websites recommended to scan the registry for errors that might be causing the slow down. I used Reg Genie to scan and fix about 700 errors and it worked better after that. But now yesterday it acted up again so I used RegGenie again and it found over 800 errors, and I had also uninstalled a few programs earlier in the day.

After I fixed those errors, the browsing of the Internet was back to normal speed. Then I went to look in My Documents for some reason and a message box popped up and said:

explorer.exe: class not registered.

I've had this PC for over 2 years and have never seen this message before. And the only programs that load ok are IE, Firefox, MS Word and AIM. I can't access My Computer, Control Panel, My Documents, etc. I tried to go to system restore, it says: "A device attached to the system is not functioning" Same message when I try to run regedit. I also cannot get into RegGenie to undo the changes.

I get the feeling I might have to re-install the OS. But if anyone knows of something to try that might reverse this problem, I'd be greatly appreciated.

Thank you.
 

My Computer

Thedarkside

Member
You could try going to a command prompt and and running the SFC (system file check) command.

"sfc /scannow" i believe it is
 

My Computer

System One

  • Manufacturer/Model
    Toshiba Laptop A505 S6965
    CPU
    Intel Core2 Duo P7350 2.0Ghz
    Memory
    4Gb DDR2
    Graphics Card(s)
    ATI Mobility Radeon HD 4570 (512MB)
    Monitor(s) Displays
    16in.
    Screen Resolution
    1366x768
    Hard Drives
    500gig
    Internet Speed
    10Mb/896Kb

richc46

Vista Guru
Gold Member

My Computer

System One

  • Manufacturer/Model
    Dell XPS420
    Memory
    6 gig
    Graphics Card(s)
    ATI Radeon HD3650 256 MB
    Sound Card
    Intergrated 7.1 Channel Audio
    Monitor(s) Displays
    Dell SP2009W 20 inch Flat Panel w Webcam
    Hard Drives
    640 gb
    Cooling
    Fan
    Mouse
    Dell USB 4 button optical
    Keyboard
    Dell USB
    Other Info
    DSL provided by ATT

radxxryan

New Member
Thanks for the advice guys. Unfortunately my PC doesn't recognize sfc in the command prompt. I downloaded Malwarebytes, both by saving it to desktop and by just running it. When I just clicked run, it downloaded and then said:

ShellExecuteEx failed; Code 31
A device attached to the system is not functioning.

Should I try something in the BIOS; Safe Mode or something similar?
 

My Computer

richc46

Vista Guru
Gold Member
You probably did not do the sfc correctly. Read the manual, run as administrator, right click and run as administrator.

Once we know that the sfc checks out, there are several other tests we can make. We will figure this out.
 

My Computer

System One

  • Manufacturer/Model
    Dell XPS420
    Memory
    6 gig
    Graphics Card(s)
    ATI Radeon HD3650 256 MB
    Sound Card
    Intergrated 7.1 Channel Audio
    Monitor(s) Displays
    Dell SP2009W 20 inch Flat Panel w Webcam
    Hard Drives
    640 gb
    Cooling
    Fan
    Mouse
    Dell USB 4 button optical
    Keyboard
    Dell USB
    Other Info
    DSL provided by ATT
Top