Hi Lora and welcome to Daniweb forums .
I have to say that I have not seen the about:blank infection for a very long time. When did you acquire it?

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Can you please do the following.

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Can you disable Windows Defender as it may interfere with the removal process. Please leave it disabled until your PC has been given the all clear.

• Open Windows Defender
• Click Tools
• Click General Settings
• Scroll down to Real Time Protection Options
• Uncheck Turn on Real Time Protection (recommended)
• After you uncheck this, click on the Save button
• Close Windows Defender

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Scan with HijackThis and then place a check next to all the following, if present:


R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://hsremove.com/done.htm
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://hsremove.com/done.htm
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =

O3 - Toolbar: (no name) - {300BC64A-BF32-4cc8-8917-91148CEFE700} - (no file)


Now, close all instances of Internet Explorer and any other windows you have open except HiJackThis, click "Fix checked".

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After rebooting, rescan with hijackthis and post back a new log.