I've heard that from more than one source. Irregular operation of different programs/processes. This may be one of the things that the beta version hasn't quite fixed yet. I believe there is 4 settings, off, 1, 2 and 3 (3 being max). The system defaults to the #2 position. Even with the #2 position, I'm not getting even close to the amount of UAC prompts that I was getting with Vista. Your system should run fine with #2. When later beta versions are released, hopefully the UAC will resume normal operations in all settings.
System Manufacturer/Model Number Dell XPS 420 OS Windows 7 RC CPU Intel Q6600 Quad Core Motherboard Dell Proprietary Memory 4 GB DDR 800 Graphics Card Nvidia 8800GT Sound Card Integrated - Sigmatel HD Audio Monitor(s) Displays Dual Dell 22" Wide Screen Screen Resolution 3360x1050
Keyboard Dell USB Mouse Wireless MS mouse PSU Big Enough Case Dell XPS 420 Cooling Air Hard Drives 320 GB internal
2.5 TB external Internet Speed DSL 3MB Down Other Info WEI 5.9 (Windows 7 RC), Not too bad for an off the shelf PC :)
More and more apps/progs are being written with UAC in mind; it will become increasingly difficult for Windows OSs to operate correctly with UAC disabled. When one installs something and it has been written to "look" for UAC and it can't find it, it doesn't know what to do. (to be simplistic) Everyone may as well get used to leaving it at default so that "things" will run correctly.
System Manufacturer/Model Number Airbot 2.0 OS Windows 7 Ultimate x64 SP1 CPU Core i7 920 (D0) @ 4Ghz, *26c idle *65c full load on air Motherboard Asus P6X58D Premium - Sata 6Gb/s - USB 3.0 Memory 12GB DDR3 Corsair Dominator -CMD12GX3M6A1600C8 at 1600MHz Graphics Card EVGA GeForce GTX 480 -Aftermaket Accelero Xtreme Plus cooler Sound Card ASUS Xonar D2X Monitor(s) Displays 1 LG 24" Flatron W2453V-PF 1 Samsung 24" P2450H both 2ms RT Screen Resolution 1920x1080@60hz
Keyboard Logitech Wireless MK700 Mouse Logitech Wireless MK700 PSU Corsair HX1000W Case Cooler Master HAF 932 Cooling Case Fans *3 230mm, *1 140mm/CPU - *Tuniq Tower 120 Extreme Hard Drives 1 OCZ Vertex2 180GB SSD
1 TB Samsung Spinpoint F1 7200RPM 32MB cache
2 500GB WD Caviar Blacks 7200RPM 32MB cache (WD5001AALS)
Pioneer DVD Burner DVR-S18M Internet Speed DL 15 Mbps UL 0.98 Mbps Antivirus None Browser Firefox Nightly Other Info Processor-7.7 *RAM- 7.9 *Graphics-7.9 *Gaming Graphics- 7.9 *SSD- 7.8 W.E.I final score= 7.7
*Phone- Samsung Galaxy Nexus
You can also tweak these settings by going into Control Panel - Administrative Tools - Local Security Policy and then click on Security Options. Towards the bottom of the list of items are the UAC options.