Mohammed Shamin Uddin (centre) is on trial with two others
A man who denies a charge of preparing for terrorism by meeting the leader of a plot to bomb passenger aircraft has said he was just "a friend".
Mohammed Shamin Uddin said he did not know what his laptop was being used for when plotter Abdulla Ahmed Ali used it.
Footage of the 9/11 attacks and beheadings found at Mr Uddin's home had "disgusted" him, he also told Woolwich Crown Court, in south-east London.
Three men deny assisting Ali, who has been convicted of conspiracy to murder.
He spent 58 minutes on the computer belonging to Mr Uddin during a visit to the defendant's Stoke Newington home, in north London, in July 2006.
Various websites connected with the use of hydrogen peroxide were visited, the court heard.
"He was my friend, I had no problem with that [using the laptop], but what he did or didn't do - I didn't think anything of it," Mr Uddin told the court.
The 39-year-old denied prosecutor Peter Wright QC's suggestion that he "sympathised with violent acts of aggression involving acts of terrorism".
"You sympathised with a violent Islamist agenda. That is why he [Ali] came to your address and used your facilities."
"No, no way," replied Mr Uddin.
In September, Ali was jailed for at least 40 years after being convicted of plotting to detonate liquid bombs on flights from the UK to North America.
The court heard Mr Uddin claim that he had been handed a CD, containing footage of Osama Bin Laden, the 11 September 2001 attacks and beheadings, at an event in 2005.
"I have to admit I viewed it, I didn't have to but I did. I was disgusted and I never watched it again," he said.
Mr Wright alleged that another disc found in Mr Uddin's possession contained information on explosives, poisons and acts of terrorism.
"The sad fact, I suggest, is that you were caught red-handed," the prosecutor said.
The court heard medical evidence that a brain injury suffered by Mr Uddin, from an assault in 2003, continued to affect his memory and cognitive function.
He is on trial with Adam Khatib, 22, of Walthamstow, and Nabeel Hussain, 25, of Chingford, both in east London.
Mr Uddin is accused of preparing for terrorism by meeting with Ali four times in July and August 2006. He is also accused of researching the use and purchase of hydrogen peroxide and possessing materials that could be used for terrorism.
Mr Khatib is accused of conspiracy to murder by plotting with Ali, three other convicted men and "persons unknown".
Mr Hussain is accused of preparing for terrorism by meeting Ali twice in July 2006. He is also accused of having various items - a will, mobile phones and a £25,000 loan application - for use in terrorism.
The men deny all the charges.