Windows 7: sehr langsam, C ist weg, Defrag geht nicht, DVD Laufwerk arbeitet nicht u.s.w.

Fix result of Farbar Recovery Tool (FRST written by Farbar) (x64) Version: 07-12-2014 02
Ran by Christel at 2014-12-07 17:00:27 Run:1
Running from C:\Users\Christel\Downloads
Loaded Profile: Christel (Available profiles: Christel)
Boot Mode: Normal
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Content of fixlist:
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Task: {608CC912-EAB9-489D-81C5-BC56E034BF06} - \DriverScanner No Task File <==== ATTENTION
HKLM\SOFTWARE\Policies\Microsoft\Internet Explorer: Policy restriction <======= ATTENTION
HKU\S-1-5-21-919170129-122027638-1657673225-1001\SOFTWARE\Policies\Microsoft\Internet Explorer: Policy restriction <======= ATTENTION
HKLM\Software\Wow6432Node\Microsoft\Internet Explorer\Main,Start Page = hxxp://www.better-search.net/?src=10&st=12&i=998&did=10874&ppd=,,,,,,,,,www.smilebox.com&barid=1523565517676214412
SearchScopes: HKLM-x32 -> DefaultScope {EEE6C360-6118-11DC-9C72-001320C79847} URL = hxxp://www.better-search.net/?q={searchTerms}&src=6&q={searchTerms}&st=12&i=998&did=10874&ppd=,,,,,,,,,www.smilebox.com&barid=1523565517676214412
SearchScopes: HKLM-x32 -> {EEE6C360-6118-11DC-9C72-001320C79847} URL = hxxp://www.better-search.net/?q={searchTerms}&src=6&q={searchTerms}&st=12&i=998&did=10874&ppd=,,,,,,,,,www.smilebox.com&barid=1523565517676214412
SearchScopes: HKU\S-1-5-21-919170129-122027638-1657673225-1001 -> DefaultScope {0633EE93-D776-472f-A0FF-E1416B8B2E3A} URL = 
SearchScopes: HKU\S-1-5-21-919170129-122027638-1657673225-1001 -> {0633EE93-D776-472f-A0FF-E1416B8B2E3A} URL = 
SearchScopes: HKU\S-1-5-21-919170129-122027638-1657673225-1001 -> {EEE6C360-6118-11DC-9C72-001320C79847} URL = hxxp://www.better-search.net/?q={searchTerms}&src=6&q={searchTerms}&st=12&i=998&did=10874&ppd=,,,,,,,,,www.smilebox.com&barid=1523565517676214412
         
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"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Logon\{608CC912-EAB9-489D-81C5-BC56E034BF06}" => Key deleted successfully.
"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tasks\{608CC912-EAB9-489D-81C5-BC56E034BF06}" => Key deleted successfully.
"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree\DriverScanner" => Key deleted successfully.
"HKLM\SOFTWARE\Policies\Microsoft\Internet Explorer" => Key deleted successfully.
"HKU\S-1-5-21-919170129-122027638-1657673225-1001\SOFTWARE\Policies\Microsoft\Internet Explorer" => Key deleted successfully.
HKLM\Software\Wow6432Node\Microsoft\Internet Explorer\Main\\Start Page => Value was restored successfully.
HKLM\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\SearchScopes\\DefaultScope => Value was restored successfully.
"HKLM\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\SearchScopes\{EEE6C360-6118-11DC-9C72-001320C79847}" => Key deleted successfully.
"HKCR\Wow6432Node\CLSID\{EEE6C360-6118-11DC-9C72-001320C79847}" => Key not found.
HKU\S-1-5-21-919170129-122027638-1657673225-1001\SOFTWARE\Microsoft\Internet Explorer\SearchScopes\\DefaultScope => value deleted successfully.
"HKU\S-1-5-21-919170129-122027638-1657673225-1001\SOFTWARE\Microsoft\Internet Explorer\SearchScopes\{0633EE93-D776-472f-A0FF-E1416B8B2E3A}" => Key deleted successfully.
"HKCR\CLSID\{0633EE93-D776-472f-A0FF-E1416B8B2E3A}" => Key not found.
"HKU\S-1-5-21-919170129-122027638-1657673225-1001\SOFTWARE\Microsoft\Internet Explorer\SearchScopes\{EEE6C360-6118-11DC-9C72-001320C79847}" => Key deleted successfully.
"HKCR\CLSID\{EEE6C360-6118-11DC-9C72-001320C79847}" => Key not found.

==== End of Fixlog ====