Here's the error I get when installing the new link, same error:
06.09.201223:41:06Started: 06.09.2012, 23:41:06
06.09.201223:41:06Operation set to INST_OP_UNKNOWN
06.09.201223:41:06Old version: ffffffff (-1)
06.09.201223:41:06SYNCER: Agent=Syncer/5.00 (ais-1466;p)
06.09.201223:41:06Running SETUP_AIS-5ba (1466)
06.09.201223:41:06Operating system: Windows 7 ver 6.1, build 7601, sp 1.0 [Service Pack 1]
06.09.201223:41:06Memory: 73% load. Phys:831724/2097151K free, Page:1769860/4194303K free, Virt:2029284/2097024K free
06.09.201223:41:06Computer WinName: MYCOMPUTER-PC
06.09.201223:41:06Windows Net User: MyComputer-PC\Rawr
06.09.201223:41:06Cmdline: /sfx /sfxstorage "C:\Users\Rawr\AppData\Local\Temp\_av_sfx.tm~a04908" /GetEdition:free /brandcode "A" /srcpath "C:\Users\Rawr\Desktop" /sfxname "avast_free_antivirus_setup"
06.09.201223:41:06DldSrc set to sfx
06.09.201223:41:06Old version: ffffffff (-1)
06.09.201223:41:06Deleted registry: Software\AVAST Software\Avast\UpdateReady
06.09.201223:41:06Install check: SetupVersion does NOT exist
06.09.201223:41:06SGW32AIS::CheckIfInstalled set m_bAlreadyInstalled to 0
06.09.201223:41:07Setup GUI has been successfuly loaded from DLL.
06.09.201223:41:07SYNCER: Agent=Syncer/5.00 (ais-1466;p)
06.09.201223:41:07SYNCER: Type: use IE settings
06.09.201223:41:07SYNCER: Auth: another authentication, use WinInet
06.09.201223:41:07Ignoring cmdline switch: /GetEdition:free
06.09.201223:41:07Get registry: Software\Microsoft\Internet Explorer\Version=8.0.7601.17514
06.09.201223:41:07Operation set to INST_OP_INSTALL
06.09.201223:41:07GUID: d9c2c085-2898-43ac-86ee-7f94191554e8
06.09.201223:41:07SelectCurrent: selected server 'tmp sfx storage' from 'sfx'
06.09.201223:41:07SYNCER: Type: use IE settings
06.09.201223:41:07SYNCER: Auth: another authentication, use WinInet
06.09.201223:41:07Changed Edition=1
06.09.201223:41:07Entered SetupProcessAIS::Do( INST_OP_INSTALL )
06.09.201223:41:07Entered SetupProcessWin32Avast::Do( INST_OP_INSTALL )
06.09.201223:41:07Entered SetupProcessWin32::Do( INST_OP_INSTALL )
06.09.201223:41:07Entered SetupProcess::Do( INST_OP_INSTALL )
06.09.201223:41:07Used server: C:\Users\Rawr\AppData\Local\Temp\_av_sfx.tm~a04908
06.09.201223:41:12LoadPartInfo: jrog = jrog-a7 returned 00000000
06.09.201223:41:12LoadPartInfo: jrog2 = jrog2-5a4 returned 00000000
06.09.201223:41:12LoadPartInfo: program = prg_ais-5ba returned 00000000
06.09.201223:41:12LoadPartInfo: setup = setup_ais-5ba returned 00000000
06.09.201223:41:12LoadPartInfo: vps = vps_win32-12082100 returned 00000000
06.09.201223:41:12Part prg_ais-5ba was set to be installed
06.09.201223:41:12Part vps_win32-12082100 was set to be installed
06.09.201223:41:12Part setup_ais-5ba was set to be installed
06.09.201223:41:12Part jrog-a7 was set to be installed
06.09.201223:41:12Part jrog2-5a4 was set to be installed
06.09.201223:41:40SYNCER: Agent=Syncer/5.00 (ais-1466;p)
06.09.201223:41:40LoadPartInfo: jrog = jrog-a7 returned 00000000
06.09.201223:41:40LoadPartInfo: jrog2 = jrog2-5a4 returned 00000000
06.09.201223:41:40LoadPartInfo: program = prg_ais-5ba returned 00000000
06.09.201223:41:40LoadPartInfo: setup = setup_ais-5ba returned 00000000
06.09.201223:41:40LoadPartInfo: vps = vps_win32-12082100 returned 00000000
06.09.201223:41:40Part prg_ais-5ba was set to be installed
06.09.201223:41:40Part vps_win32-12082100 was set to be installed
06.09.201223:41:40Part setup_ais-5ba was set to be installed
06.09.201223:41:40Part jrog-a7 was set to be installed
06.09.201223:41:40Part jrog2-5a4 was set to be installed
06.09.201223:42:12Uninstalling aswTdi.sys
06.09.201223:42:12Stopping service aswTdi
06.09.201223:42:12OpenSCManager
06.09.201223:42:12OpenService
06.09.201223:42:12OpenService, errcode: 0x00000424
06.09.201223:42:12Service aswTdi stopped, errcode: 0x00000424
06.09.201223:42:12Cannot open reg. key:Software\Microsoft\Windows\CurrentVersion\App Paths\AvastUI.exe
06.09.201223:42:12RegLoadKey(HKEY_USERS, Av_S-1-5-18, C:\Windows\system32\config\systemprofile\NtUser.dat)
06.09.201223:42:12RegLoadKey(HKEY_USERS, Av_S-1-5-19, C:\Windows\ServiceProfiles\LocalService\NtUser.dat)
06.09.201223:42:12Load registry hive ERROR_SHARING_VIOLATION
06.09.201223:42:12RegLoadKey(HKEY_USERS, Av_S-1-5-20, C:\Windows\ServiceProfiles\NetworkService\NtUser.dat)
06.09.201223:42:12Load registry hive ERROR_SHARING_VIOLATION
06.09.201223:42:12RegLoadKey(HKEY_USERS, Av_S-1-5-21-2440313476-945273285-359036203-1023, C:\Users\UpdatusUser\NtUser.dat)
06.09.201223:42:12Load registry hive ERROR_SHARING_VIOLATION
06.09.201223:42:12RegLoadKey(HKEY_USERS, Av_S-1-5-21-2440313476-945273285-359036203-1024, C:\Users\Rawr\NtUser.dat)
06.09.201223:42:12Load registry hive ERROR_SHARING_VIOLATION
06.09.201223:42:12RegLoadKey(HKEY_USERS, Av_S-1-5-21-2440313476-945273285-359036203-501, C:\Users\Guest\NtUser.dat)
06.09.201223:42:12Cannot load registry hive C:\Users\Guest\NtUser.dat, err=3.
06.09.201223:42:12RegLoadKey(HKEY_USERS, Av_S-1-5-82-3006700770-424185619-1745488364-794895919-4004696415, C:\Users\DefaultAppPool\NtUser.dat)
06.09.201223:42:12Cannot load registry hive C:\Users\DefaultAppPool\NtUser.dat, err=3.
06.09.201223:42:12Transferred: files 1, bytes 1, time 827 ms
06.09.201223:42:12Retries: total 0, files 0, servers 1
06.09.201223:42:12GetLicNumber: LoadLibrary( C:\Program Files\AVAST Software\Avast\ashBase.dll ) return value: 0x00000000
06.09.201223:42:12Error: ashBase.dll (C:\Program Files\AVAST Software\Avast\ashBase.dll) could not be loaded
06.09.201223:42:15DldSrc set to inet
06.09.201223:42:15Server definition(s) loaded for 'main': 185 (maintenance:0)
06.09.201223:42:15SelectCurrent: selected server 'Download351 AVAST5 Server' from 'main'
06.09.201223:42:15SYNCER: Type: use IE settings
06.09.201223:42:15SYNCER: Auth: another authentication, use WinInet
06.09.201223:42:16Sending stats '
http://stats7.avast.com/cgi-bin/iavs4stats.cgi': 00000000 204
06.09.201223:42:16NeedReboot=false
06.09.201223:42:16Return code: 0x00000005 [Access is denied.]
06.09.201223:42:16Stopped: 06.09.2012, 23:42:16
Edit: Sorry didn't read what you said, the error on my screen goes:
Uninstalling progess:
Creating system restore point
[ A BIG RED X IS HERE ]
Setup finished
There was an error while completing the setup process