I was on a forum, and I clicked a topic and this Adware.w32.spyshredder alert! notice came up and then this screen saver thing would pop up with roaches. What do I do? I already ran "Malwarebytes' Anti-Malware" and the log says:

Malwarebytes' Anti-Malware 1.12
Database version: 796

Scan type: Full Scan (C:\|)
Objects scanned: 137457
Time elapsed: 1 hour(s), 7 minute(s), 51 second(s)

Memory Processes Infected: 1
Memory Modules Infected: 0
Registry Keys Infected: 19
Registry Values Infected: 1
Registry Data Items Infected: 0
Folders Infected: 2
Files Infected: 8

Memory Processes Infected:
C:\WINDOWS\system32\ctfmona.exe (Trojan.Downloader) -> Unloaded process successfully.

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
HKEY_CLASSES_ROOT\Interface\{04a38f6b-006f-4247-ba4c-02a139d5531c} (Adware.Minibug) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Typelib\{3c2d2a1e-031f-4397-9614-87c932a848e0} (Adware.Minibug) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\minibugtransporter.minibugtransporterx (Adware.Minibug) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\minibugtransporter.minibugtransporterx.1 (Adware.Minibug) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\CLSID\{2b96d5cc-c5b5-49a5-a69d-cc0a30f9028c} (Adware.Minibug) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{549b5ca7-4a86-11d7-a4df-000874180bb3} (Trojan.Agent) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\toolbar.tb (Adware.BHO) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\CLSID\{d83a7b12-a4d4-4984-8f72-d41c6b4c1e6e} (Adware.BHO) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{d83a7b12-a4d4-4984-8f72-d41c6b4c1e6e} (Adware.BHO) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\toolbar.tb.1 (Adware.BHO) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Ext\PreApproved\{90b5a95a-afd5-4d11-b9bd-a69d53d22226} (Adware.Hotbar) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\CLSID\{8109fd3d-d891-4f80-8339-50a4913ace6f} (Adware.Zango) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Ext\PreApproved\{8109fd3d-d891-4f80-8339-50a4913ace6f} (Adware.Zango) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Interface\{85e06077-c824-43d0-a8dc-5efb17bc348a} (Adware.Zango) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Typelib\{5937cd7f-1c0b-41e1-9075-60ebdf3c7d34} (Adware.Zango) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Interface\{8b8f6968-2f24-41e3-b653-e9613226f14d} (Trojan.KeenValue) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Typelib\{de289bfa-737b-4abb-a4ec-f8753551b875} (Trojan.KeenValue) -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\SOFTWARE\RX ToolBar (Adware.RXToolbar) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Software Notifier (Rogue.Multiple) -> Quarantined and deleted successfully.

Registry Values Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ctfmona (Trojan.Downloader) -> Quarantined and deleted successfully.

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
C:\Program Files\WinBudget (Adware.AdMedia) -> Quarantined and deleted successfully.
C:\Program Files\WinBudget\bin (Adware.AdMedia) -> Quarantined and deleted successfully.

Files Infected:
C:\Program Files\eSoftware\studio.dll (Adware.BHO) -> Quarantined and deleted successfully.
C:\Documents and Settings\Administrator\Local Settings\Temp\.tt5.tmp (Rogue.AdvancedXPFixer) -> Delete on reboot.
C:\System Volume Information\_restore{0028ECC9-6BB1-47DD-A5FF-721D9A9DA241}\RP829\A0701266.dll (Adware.Coupons) -> Quarantined and deleted successfully.
C:\WINDOWS\system32\blackster.scr (Trojan.Agent) -> Quarantined and deleted successfully.
C:\WINDOWS\system32\ctfmonb.bmp (Malware.Trace) -> Quarantined and deleted successfully.
C:\Program Files\WinBudget\bin\matrix.dll (Adware.AdMedia) -> Quarantined and deleted successfully.
C:\Documents and Settings\Administrator\Local Settings\Temp\.tt2.tmp (Trojan.Downloader) -> Quarantined and deleted successfully.
C:\WINDOWS\system32\ctfmona.exe (Trojan.Downloader) -> Quarantined and deleted successfully.

BUT, when I open up windows and for instance, I open up another window, sometimes it freezes up and says "blank page" and then the window closes (or has to be closed out).

Did you reboot the computer after using MBAM? If it encounters a file that is difficult to remove, you need to restart the computer so the malware can be fully removed. Failure to do so will prevent MBAM from removing all the malware. Your log indicates some files will be deleted on reboot. If you have not rebooted, make sure you do this. When done, rescan again with MBAM and post the new log report.

If you're using Windows 2000/XP, please print out and follow the instructions for using SDFix in BC's self-help tutorial "How to use SDFix".
-- When using this tool, you must use the Administrator's account or an account with "Administrative rights"
-- Disconnect from the Internet and temporarily disable your anti-virus and any anti-malware real time protection before performing a scan.
When done, the SDFix report log will open in notepad and automatically be saved in the SDFix folder as Report.txt. Please copy and paste the contents of Report.txt in your next reply. Be sure to renable you anti-virus and and other security programs before connecting to the Internet.