Hello And welcome to BleepingComputers matrixv.
To get the workoffline message to go away open internet explorer and click file. then down at the bottom it will say work offline,make sure this is not checked. As for the chxefp.exe I can not find anything on this not even google nor yahoo turns up anything. It could be a legitimat program in windows but as said nothing being found. Is it spelled correctly?
Here is how to stop Install on demand
To disable the Install On Demand feature in Internet Explorer: On the Tools menu, click Internet Options.Click the Advanced tab. Under Browsing, click to clear the Enable Install On Demand or the Enable Install On Demand (Internet Explorer) and/or Enable Install On Demand (Other) check boxes.Click OK.
Disabling the Automatically Check for Internet Explorer Updates Feature
To disable the "Automatically check for Internet Explorer updates" feature in Internet Explorer:
On the Tools menu, click Internet Options.
Click the Advanced tab. Under Browsing, click to clear the Automatically check for Internet Explorer updates check box. Click OK.
try running a hijack this and paste it in this forumhttp://www.bleepingcomputer.com/forums/ind...hp?showforum=22
Here is where you can get the program Hijack thisDownload Hijack This