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Periodically, my Google Chrome home page (which I have originally set myself) changes spontaneously on opening the browser to display, instead, the page showing the rectangular small images of webpages I have visited before. In addition the bookmarks bar and my homepage icon has disappeared. I am also not directed to any other website location as might occur if a virus or malware were involved.

I can correct all of these changes back to my original settings the way I prefer (and nothing prevents my resetting it) and can continue to browse with no difficulty but this changed situation has happened several times in the past month. I had assumed that this was an idiosyncrasy of how Chrome (mis)behaves but worry whether virus or malware might be involved. I have monitoring by antiviral and antimalware software and run periodic complete scans and occasionally these find Trojans and other malware which are removed but this browser behavior seems to recur

I would like to prevent the surprises

Thank you.

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Which operating system are you using? Under Options -> Basic do you have "On Startup" set to "Open the home page", or something else? Do you have Sync enabled under "Personal Stuff"? –  Jason Aller Mar 10 '11 at 21:37
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It sounds like the Preferences file is not getting written. Do you have permissions to it? (You should, Chrome creates the User Data folder in your own directory.) –  Synetech Mar 11 '11 at 6:32
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3 Answers 3

As for your bookmarks bar, you may have closed it accidentally by the keyboard shortcut. Hold Crtl+Shift+B to bring it back.

For the homepage problem make sure in options (under basics) that "Open the home page" is selected under the "On startup" section and that "Open this page" is selected under the "Home Page" section.

"Show Home Button" should also be checked under the "toolbar" section if your icon is not there.

If there settings keep getting lost then your config file might be corrupted. In that case you'll need to manually delete and reinstall all the chrome files

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You probably installed a program, and in doing so an unnoticed option during the program installation was to change your home page (and/or often your default search engine). When installing new programs, uncheck any boxes that state they will make these changes.

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You may be thinking of Safari which has that feature of showing the thumbnails by default, or Opera which lets you set up a grid of 9 (3x3) to 25 (5x5) thumbnails for the alternative to the default home page.

To check for SpyWare (MalWare), I suggest using these tools:

  Malware Bytes
  http://www.malwarebytes.org/

  SpyBot - Search & Destroy
  http://security.kolla.de/

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> You may be thinking of… No, Bob is saying that even though he sets the homepage to something else, it keeps reverting to the New Tab page. –  Synetech Mar 11 '11 at 6:31
    
@Synetech inc.: Actually, Bob wrote "... changes spontaneously on opening the browser to display, instead, the page showing the rectangular small images of webpages I have visited before ..." which doesn't mention a new tab. (You seem to have picked on quite a few of my answers ever since you got upset with me for mentioning DOS a while back in a different question, and I do hope that this isn't going to continue to be a recurring theme with you.) –  Randolf Richardson Nov 7 '11 at 4:20
    
> “the page showing the rectangular small images of webpages I have visited before ...” which doesn't mention a new tab That IS the New Tab page. In case you have not used Chrome before, the New Tab page (assuming no extensions to change it), shows eight thumbnails of the most visited pages. > “You seem to have picked on quite a few of my answers…” I don’t see where he said that (yes, I checked the previous revisions of the question). –  Synetech Nov 7 '11 at 4:25
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