Class not registered (Exception from HRESULT: 0x800154).....

So EVERYTHING was working perfectly fine today on my Sony Vaio VGN-FW510D Laptop until I uninstalled Team Fortress 2 today. (It's a game) I used Revo Uninstaller to uninstall it and then scanned and deleted the leftovers (it scans and deletes leftover files and folders and registry strings/keys) ... everything was fine... then, I went to eat dinner.... I come back and log on... First problem I notice, no sound. For some reason there were no more sounds working anymore... I tried YouTube videos, going into Playback devices, sound check... nothing worked... The next problem was these two windows error boxes that now pop up when I log on.. The box both say:

SmartWi Connection Utility

Class not registered (Exception from HRESULT: 0x80040154(REGDB_E_CLASSNOTRED))

And now my wireless internet does not work! (That's the SmartWi..)
Yes... right now I'm typing using a temporary wired connection
So... being able to solve many computer related problems myself, I tried all of these methods and obviously did not succeed.. :

- CCLEANER
- Free Windows Registry Repair
- Little Registry Cleaner
- Windows Disk Check
- Windows Memory Check
- Safe Mode
- System Restore
- Uninstalling STEAM
- Re-Installing SmartWi Connection

Please.... anyone who's knowledgeable with registry keys and such, I think I accidentally deleted an important registry key with Revo Uninstaller and I need to do the Run: regsvr32 ______.dll thing... but I'm not experienced with it and I don't know which .dll's to put....
Any help will be greatly appreciated

So the problems are:
- No Sound
- No Wireless Internet

I have a Sony Vaio Laptop and I'm using Windows 7 64-bit... this same message will be posted on other forums so please don't say something obvious like check Sony's forums..

Hi, welcome to the forums

Have you tried uninstalling the SmartWi software then downloading the latest version from the Sony site and re-installing?

A re-install of the software should replace any missing registry entries that would have been previously removed, regardless of how.