[Resolvido] PC com sintomas 'estranhos' - Lerdeza, Freezes, boot em 'duas etapas' -realmente não sei o que fazer

Boa tarde!

Segue o log do adwcleaner:
[spoiler]
# AdwCleaner v5.008 - Relatório criado 24/09/2015 às 16:20:25
# Atualizado 18/09/2015 por Xplode
# Banco de dados : 2015-09-23.1 [Servidor]
# Sistema operacional : Windows 7 Ultimate Service Pack 1 (x64)
# Usuário : Usuário - USUÁRIO-PC
# Executando de : C:\Users\Usuário\Downloads\adwcleaner_5.008.exe
# Opção : Limpar
# Apoio : http://toolslib.net/forum

***** [ Serviços ] *****

[-] Serviço Excluído : swdumon

***** [ Pastas ] *****

[-] Pasta Excluído : C:\Users\Usuário\AppData\Local\slimware utilities inc

***** [ Arquivos ] *****

[-] Arquivo Excluído : C:\Windows\Sysnative\drivers\swdumon.sys

***** [ Atalhos ] *****


***** [ Tarefas agendadas ] *****


***** [ Registro ] *****

[-] Valor Excluída : HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Ext\CLSID [{3593C8B9-8E18-4B4B-B7D3-CB8BEB1AA42C}]
[-] Valor Excluída : HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Ext\CLSID [{51D26BB4-4D2C-4AE4-9873-5FF41B6DED1F}]
[-] Chave Excluída : HKCU\Software\SlimWare Utilities Inc
[-] Chave Excluída : HKLM\SOFTWARE\SlimWare Utilities Inc
[-] Chave Excluída : HKLM\SOFTWARE\SLIMWARE UTILITIES, INC.
[!] Chave Não Excluída : [x64] HKCU\Software\SlimWare Utilities Inc

***** [ Navegadores ] *****

[-] [C:\Users\Usuário\AppData\Local\Google\Chrome\User Data\Default\Web Data] [Search Provider] Excluído : br.ask.com

*************************

:: Configurações Winsock restauradas

########## EOF - C:\AdwCleaner\AdwCleaner[C1].txt - [1446 bytes] ##########
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e o do JRT
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Junkware Removal Tool (JRT) by Malwarebytes
Version: 7.6.3 (09.21.2015:1)
OS: Windows 7 Ultimate x64
Ran by Usu rio on 24/09/2015 at 16:28:33,25
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~




~~~ Services



~~~ Tasks



~~~ Registry Values



~~~ Registry Keys

Successfully deleted: [Registry Key] HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer



~~~ Files



~~~ Folders

Successfully deleted: [Folder] C:\users\Public\Documents\downloaded installers
Successfully deleted: [Folder] C:\Users\Usu rio\AppData\Roaming\getrighttogo



~~~ FireFox

Emptied folder: C:\Users\Usu rio\AppData\Roaming\mozilla\firefox\profiles\theg8z79.default\minidumps [2 files]



~~~ Chrome


[C:\Users\Usu rio\Appdata\Local\Google\Chrome\User Data\Default\Preferences] - default search provider reset

[C:\Users\Usu rio\Appdata\Local\Google\Chrome\User Data\Default\Preferences] - Extensions Deleted:

[C:\Users\Usu rio\Appdata\Local\Google\Chrome\User Data\Default\Secure Preferences] - default search provider reset

[C:\Users\Usu rio\Appdata\Local\Google\Chrome\User Data\Default\Secure Preferences] - Extensions Deleted:
[]





~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Scan was completed on 24/09/2015 at 16:31:50,93
End of JRT log
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[/spoiler]

Abraços!