When I reboot my PC I get error msg: "procedure entry point SQlite3_wal-checkpoint could not be found..."

Question

I had to uninstall prior version of iTunes to install IOS5 in my iPhone 4 (relatively new phone, only about 5 weeks old).  It took several attempts to install IOS 5, and I finally succeeded only after disableing Kaspersky AV and the Windows Firewall.  This, even though the iTunes connection diagnostics reported everything was OK, no errors and all green indicators.  I had opened iTunes as Administrator too.  So, now I have IOS 5 installed and running ok on the iPhone4, but I have a new problem on my PC that arose from all the different attempts to get this done.  Here's more detail on the procedures and system changes I had made on my PC, and then what I get for the error msg.
1) As Instructed by an Apple rep, I UNINTSTALLED both iTunes and Quicktime.  I then rebooted and ran iTunes in Admin mode, used the Connection diagnosis (reported all OK) and then tried to install IOS 5 on my iPhone4.  The download (which would take between 30-45 minutes on each attempt) would fully complete and then I'd get an error msg of "server timeout".  This led to further advice from Apple telling me to try the download again, this time with AV and Firewall disabled.  So I rebooted again, disabled AV and Firewall and the IOS5 succeeded.
2) However, ever since I had removed both iTunes and Quicktime and reinstalled (only) iTunes (so far), each time I reboot my pc I get the following:
A Window opens with title: "Apple Sync Notifier exec Entry Point Not Found".  Within the box below the title the following error msg appears: "The procedure entry point SQlite3_wal_checkpoint could not be located in the dynamic link library: SQlite3.dll"
I performed a search for SQlite3 in My Computer.  It indeed shows up in a number of places, including within an Apple folder.
I'm using 64bit Win7 Home Premium SP1 on a PC with AMD Phenom II X4 945 Processor, 3 GHz with 8.00 GB RAM.
All iPhone and other applications seem to be behaving normally.  I just have to hit "OK" to get rid of that annoying (new) error message that is apparently coming about during the PC startup process.  It does NOT recur if I put the system in sleep mode, enter and exit iTunes, etc.  It only occurs on reboot.

Answer 1

I have searched my computer for that file SQlite3.dll and also file QTCF.dll and I cannot find either one when I search my whole computer for it.  I cannot fix this!  I deleted Itunes and every time I try to download it, it goes through all this download till the end when it says that iTunes.exe-entry point now found and that Procedure entry point message comes up.  HELP!  This is driving me crazy.  How can I get itunes to work again when I can't find the danged .dll file to remove, move or rename!?!?!??