X220 Problems after upgrade to Win 8 Pro

Hi all,
Two weeks ago I upgraded OS on my ThinkPad X220 (model 428759G, BIOS 1.37) to Windows 8 Pro X64. After upgrade I did “factory reset” (function of Windows 8), because I preferred clean installation.
Then there were installed all updates via Windows Update service. After that I installed drivers and software from Lenovo via Lenovo System Update and Avira Antivirus Premium 2013.
Now I deal with the a few problems.
1) Every day (several times a day) this service C:\Program Files\Lenovo\Lenovo Mobile Hotspot\LnvHotSpotSvc.exe stops working. More information is below (sorry for Czech language).
Popis
Cesta k chybující aplikaci: C:\Program Files\Lenovo\Lenovo Mobile Hotspot\LnvHotSpotSvc.exe
Podpis problému
Název události problému: CLR20r3
Podpis problému 01: lnvhotspotsvc.exe
Podpis problému 02: 1.0.0.0
Podpis problému 03: 50868221
Podpis problému 04: mscorlib
Podpis problému 05: 4.0.30319.18033
Podpis problému 06: 50b5a743
Podpis problému 07: 463b
Podpis problému 08: 463
Podpis problému 09: System.ArgumentException
Verze operačního systému: 6.2.9200.2.0.0.256.103
ID národního prostředí: 1029
Další informace 1: c260
Další informace 2: c260c868fe2b439579a8cdd5b50df4ea
Další informace 3: ca56
Další informace 4: ca569b82c589dd4827724bf86448a9b7
Další informace o tomto problému
ID sady: d9f78c18685917da9b5639ff6386b88a (-861750507)
2) From this webpage http://support.lenovo.com/en_US/research/hints-or-tips/detail.page?&LegacyDocID=MIGR-77280 I downloaded and installed the Hotkey Features Integration (version 3.84.1500). But not all of FN keys work properly.
For example Fn+F8 doesn’t switch off touchpad or trackpoint, FN+F5 doesn’t switch off Bluetooth or WiFi – only both of them are switched off (via Airplane mode in Windows 8). If I want to switch off Bluetooth I can do it via controls in Windows 8. But I don’t understand why Bluetooth light is still on.
3) Sometimes if laptop is woke up from sleep or hibernation mode, the system service ntoskrnl.exe (NT Kernel & System) uses CPU with 30% (fan is on high speed). Only restart fixes this problem.
Does anyone have similar problems?

Mobile hotspot error confirmed (but not important for me ).
Keys are working fine for me. BUT: I use old driver for Windows 7. The new one from January, 18th with Windows 8 look works as you described.
Btw. I dont like Bios - express card witn USB 3.0 NEC PD720200a is not working at all.
http://forums.lenovo.com/t5/Windows-8/X220-USB-3-express-card-with-NEC-uPD720201-incompatibility/td-...
Jiří Cvrk
TP YOGA S1 .. X220, X61, T22, ms w8nd8ws

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