I was using the free version but today I bought the Avast Internet Security and when trying to update it I got this error:
'C:\Users\cliente\AppData\Local\Temp\_av_iup.tm~a05344\uat.vpx' has invalid signature.
So, I uninstalled it, made a download of the free version again and got the same error message and bellow is the install log:
2016-03-01 16:22:51Infoinstcont[5896,5880]--
2016-03-01 16:22:51Infoinstcont[5896,5880]2016/03/01 16:22:51 START: Avast installer/updater
2016-03-01 16:22:51Infoinstup[5896,5880]Command: '"C:\Users\cliente\AppData\Local\Temp\_av_iup.tm~a05344\instup.exe" /edition:1 /ga_clientid:ab1688cc-910c-4180-9c27-e6118dff57a9 /guid:9e71f125-13f3-4cab-ac1a-05f6d0e4ff87 /prod:ais /sfx:lite /sfxstorage:C:\Users\cliente\AppData\Local\Temp\_av_iup.tm~a05344'
2016-03-01 16:22:51Infoinstup[5896,5880]CPU: AMD FX(tm)-6300 Six-Core Processor ,6
2016-03-01 16:22:51Infoinstup[5896,5880]OS: Windows 10 (10.0.10240) x64
2016-03-01 16:22:51Infoinstup[5896,5880]Memory: 11% load. Phys:4194303/4194303K free, Page:4194303/4194303K free, Virt:4083604/4194176K free
2016-03-01 16:22:51Infoinstup[5896,5880]DISKs: C:\ - 385GB free / 683GB total
2016-03-01 16:22:51Infoinstup[5896,5880]Running module version: instup.exe - '11.1.2245.1540'
2016-03-01 16:22:51Infoinstup[5896,5880]Running module version: Instup.dll - '11.1.2245.1540'
2016-03-01 16:22:51Infosimutex[5896,5880]Checking for the mutex ownership.
2016-03-01 16:22:51Infosimutex[5896,5880]The mutex is signaled. We are owners of the mutex.
2016-03-01 16:22:52Infoguiwizard[5896,5880]Running module version: HTMLayout.dll - '3.3.2.224'
2016-03-01 16:22:52Infoguiwizard[5896,5880]Loaded module version: C:\Users\cliente\AppData\Local\Temp\_av_iup.tm~a05344\HTMLayout.dll - '3.3.2.224'
2016-03-01 16:22:52Infoguiwizard[5896,5880]Setup gui was successfully started.
2016-03-01 16:22:52Infoinstupcore[5896,5880]Sfx setup update has started.
2016-03-01 16:22:52Infoservers[5896,5880]Server definition(s) loaded for 'C:\Users\cliente\AppData\Local\Temp\_av_iup.tm~a05344\servers.def': 29 (maintenance:0)
2016-03-01 16:22:52Infoservers[5896,5880]ChooseServer: selected server 'Download n2119288 AVAST9 Server' with current url 'http://n2119288.iavs9x.u.avast.com/iavs9x' of type 'URL_TYPE_DOWNLOAD_PROGRAM'.
2016-03-01 16:22:52Infodldwrap[5896,5880]GetFileWithRetry: 'servers.def.vpx' successfully downloaded and verified.
2016-03-01 16:22:52Infopkgengine[5896,5880]DownloadPackage(download): 'C:\Users\cliente\AppData\Local\Temp\_av_iup.tm~a05344\servers.def.vpx', ip: 200.123.199.8, size: 2576 bytes
2016-03-01 16:22:52Infoservers[5896,5880]ChooseServer: selected server 'Download n8162145 AVAST9 Server' with current url 'http://n8162145.iavs9x.u.avast.com/iavs9x' of type 'URL_TYPE_DOWNLOAD_PROGRAM'.
2016-03-01 16:22:52Infodldwrap[5896,5880]GetFileWithRetry: 'prod-pgm.vpx' successfully downloaded and verified.
2016-03-01 16:22:52Infopkgengine[5896,5880]DownloadPackage(download): 'C:\Users\cliente\AppData\Local\Temp\_av_iup.tm~a05344\prod-pgm.vpx', ip: 200.123.199.8, size: 445 bytes
2016-03-01 16:22:52Infopkgproduct[5896,5880]LoadPartInfo: program = prg_ais-b0108cd returned 0x00000000
2016-03-01 16:22:52Infopkgproduct[5896,5880]LoadPartInfo: setup = setup_ais-b0108cd returned 0x00000000
2016-03-01 16:22:52Infopkgproduct[5896,5880]LoadUatInfo: uat.vpx returned 0x00000000
2016-03-01 16:22:52Infopkgengine[5896,5880]LoadLatestProdAndParts: product file 'prod-pgm.vpx' was successfully loaded.
2016-03-01 16:22:52Infoservers[5896,5880]ChooseServer: selected server 'Download m5270201 AVAST9 Server' with current url 'http://m5270201.iavs9x.u.avast.com/iavs9x' of type 'URL_TYPE_DOWNLOAD_PROGRAM'.
2016-03-01 16:22:52Infodldwrap[5896,5880]GetFileWithRetry: 'uat.vpx' successfully downloaded and verified.
2016-03-01 16:22:52Infopkgengine[5896,5880]DownloadPackage(download): 'C:\Users\cliente\AppData\Local\Temp\_av_iup.tm~a05344\uat.vpx', ip: 200.123.199.8, size: 2488 bytes
2016-03-01 16:22:52Infodldwrap[5896,5880]GetFileWithRetry: 'uat.vpx' successfully downloaded and verified.
2016-03-01 16:22:52Infopkgengine[5896,5880]DownloadPackage(download): 'C:\Users\cliente\AppData\Local\Temp\_av_iup.tm~a05344\uat.vpx', ip: 200.123.199.8, size: 2488 bytes
2016-03-01 16:22:52Infodldwrap[5896,5880]GetFileWithRetry: 'uat.vpx' successfully downloaded and verified.
2016-03-01 16:22:52Infopkgengine[5896,5880]DownloadPackage(download): 'C:\Users\cliente\AppData\Local\Temp\_av_iup.tm~a05344\uat.vpx', ip: 200.123.199.8, size: 2488 bytes
2016-03-01 16:22:52Errorpkgengine[5896,5880]LoadLatestProdAndParts: UAT file 'C:\Users\cliente\AppData\Local\Temp\_av_iup.tm~a05344\uat.vpx' has invalid signature.
Any ideas?