Getting HTTP 403 errors in multiple browsers on only one web site

Windows 7 Home Premium x64 on Toshiba laptop. Both Chrome and IE11 installed. Both browsers get 403 forbidden errors when attempting to access houzz.com. All other sites seem to be fine. Tried clearing browser cache, cookies, all that stuff. Did a system restore to a couple of weeks ago. No change. Ideas?
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tcianfloneAsked:
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tcianfloneAuthor Commented:
Yes, the system date and time are correct.
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tcianfloneAuthor Commented:
Wouldn't you know it. Turned out to be malware. Probably the trojan.dnschanger. See Malwarebytes scan results below.

Malwarebytes Anti-Malware
www.malwarebytes.org

Scan Date: 9/21/2015
Scan Time: 3:39 PM
Logfile: ~mwbscan.txt
Administrator: Yes

Version: 2.1.8.1057
Malware Database: v2015.09.21.06
Rootkit Database: v2015.09.18.01
License: Free
Malware Protection: Disabled
Malicious Website Protection: Disabled
Self-protection: Disabled

OS: Windows 7 Service Pack 1
CPU: x64
File System: NTFS
User: 1051

Scan Type: Threat Scan
Result: Completed
Objects Scanned: 414591
Time Elapsed: 39 min, 13 sec

Memory: Enabled
Startup: Enabled
Filesystem: Enabled
Archives: Enabled
Rootkits: Disabled
Heuristics: Enabled
PUP: Enabled
PUM: Enabled

Processes: 0
(No malicious items detected)

Modules: 0
(No malicious items detected)

Registry Keys: 2
PUP.Optional.WebWatcher, HKLM\SOFTWARE\WOW6432NODE\CLASSES\CLSID\{FCE1662E-06F1-413D-80CB-33D456D1CFCB}, , [e4a655dd94f71f17ca6527c68979f709], 
PUP.Optional.WebWatcher, HKLM\SOFTWARE\CLASSES\WOW6432NODE\CLSID\{FCE1662E-06F1-413D-80CB-33D456D1CFCB}, , [e4a655dd94f71f17ca6527c68979f709], 

Registry Values: 0
(No malicious items detected)

Registry Data: 3
Trojan.DNSChanger, HKLM\SYSTEM\CURRENTCONTROLSET\SERVICES\TCPIP\PARAMETERS\Interfaces\{3BAB2E6C-281E-4568-B2A0-7F2FBB20A324}|NameServer, 208.69.150.250,208.69.150.252, Good: (), Bad: (208.69.150.250,208.69.150.252),,[c7c3a38f7e0d73c3790ee493e61f8a76]
Trojan.DNSChanger, HKLM\SYSTEM\CURRENTCONTROLSET\SERVICES\TCPIP\PARAMETERS\Interfaces\{4012062C-A632-4179-9E81-D490EB428A6D}|NameServer, 208.69.150.250,208.69.150.252, Good: (), Bad: (208.69.150.250,208.69.150.252),,[99f172c073189c9ae1a6a2d5f1145da3]
Trojan.DNSChanger, HKLM\SYSTEM\CURRENTCONTROLSET\SERVICES\TCPIP\PARAMETERS\Interfaces\{9B7BE83D-16C2-4C8B-B32A-EDCE03513670}|NameServer, 208.69.150.250,208.69.150.252, Good: (), Bad: (208.69.150.250,208.69.150.252),,[6b1fcc66f19aa393464183f472930000]

Folders: 0
(No malicious items detected)

Files: 1
Malware.Packer.Gen, c:\windows\temp\tmp0000005c615aa18be48a5d47, , [14760f23315a6ccaa4c07eea2fd1da26], 

Physical Sectors: 0
(No malicious items detected)


(end)

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